TrueNAS

Pros: I've been using TrueNAS Core server for about 4 months now.
It serves a home storage role for me and my girlfriend. Hopefully in the near future, I will persuade our two families to also accept it, so that our valuable data can have the needed care.
This will also allow me to upgrade it, and use much more of what TrueNAS has to offer.

To point out few of the best pros, here they are:
Features
Stability
Hardware compatibility
Open source nature

Cons: Without too much experience in this regard, since it is my first server, I will nevertheless be honest, and admit that after a month, there was no reply to my ticket on the TrueNAS forum.
There really are a lot of resources, but they are scattered across the web, many of them being related to an old, FreeNAS product.
Interface and guides, for better ease-of-use, are the main things that I would like to be improved. Of course, being a community supported version of TrueNAS, that has its real limits. But I believe that community will grow in the near future.

Overall: All-in-all, I have made a right decision by choosing TrueNAS as my Home/Family data server, and will suggest it for anyone who likes to control a reliable server for its data.

Pros: Reliability.
Flexibility.
Price.
UX/UI.
Easy to manage.
Snapshots.
Recovery functionality.
Encryption.
and etc.

Cons: USB external drive support.
Some UX/UI issues.

Overall: It's quite great product for not just only home needs but also for enterprise solutions.

Pros: The initial configuration was a walk in the park.
ZFS is awesome in so many ways!
The Ui in both Core and Scale is clean and organized.
Setting up VM and containers is foolproof.

Cons: It's too soon for me to list cons since i'm so new, the features i'm using work flawlessly.

Overall: The title says it all, I didn't know much about NAS before my experience with Scale, and to be honest i've been blown away by it's ease of use. It has a ton of features which i'm probably never gonna use (at least for now), but the ones I'm using are well documented, and easy to implement. I'm still learning, but overall I feel great about sticking with TrueNAS.

Pros: Web interface. Easy to use and secure. Mostly the fact that is somewhat agnostic to hardware. Requirements are not crazy bad and it just works.

Cons: Interface can be slow at times and a bit crowded and I wish they had a way to support some hardware other than inter nics.

Overall: Try it. You will not regret it. I started over 15 years ago and it has evolved to a great product line.

Pros: The stability and data integrity.
Plugins and more recently the Linux branch (Scale).
Docker support.
Growth and constant innovation.

Cons: Network stack can be a little wonky when you have multiple NICs.

Overall: Honestly my experience with TrueNAS over the years has been far better than any storage solution I've used at any job. If I had decision making powers I would migrate out NetApp junk to something from ixsystems.

Pros: - zfs filesystem features are great and stable
- apps/Kubernetes ecosystem is evolving and hopefully will continue to. A lot of apps, but stability of 3rd party updates is something the community should focus on. It's a start currently.
- good alerting
- easy to setup shares with security
- easy backup of base settings for restore

Cons: - alerting interface could be more accessible
- apps-ecosystem

Overall: - easy to start
- more advanced use-cases need to be developed more.
- Kubernetes doesn't play nice with the Kubernetes-ecosystem by default. It's possible, but not completely supported or as easy as another Kubernetes distro makes it. TrueNAS relies on its interfaces and that's a shame. The 3rd party packages focus more on this, but evolving. I hope this will change in the future.

Pros: Easy to use, plenty of folks online to help, customizing hardware to get the most out of the experience.

Cons: Unable to utilize USB storage, set USB storage to a share.

Overall: I've set up two instances fairly quickly with spare parts that I had just layin' about. Still running today.

Pros: ZFS, stability, easy to learn... Availability to manage both TrueNAS users and SMB users using one common management system is perfect solution.

Cons: CORE - unclear future.
SCALE - bad app management system.

Overall: TrueNAS is perfect as storage server, but not so good as app server because bad app management system.

Pros: I started using FreeNAS in 2011 to store media and document files. TrueNAS Scale has been a game changer - allowing Apps and hardware passthrough.

Cons: Though I applaud IX Systems work on TrueNAS Scale there is more to do for the Home Labbers out there. Improved App and Virtualization in both capability and reliability would be appreciated. The improvements since TrueNAS Scale's announcement have not gone unnoticed, but there is more work to do!

Overall: The first thing to note is that TrueNAS is a NAS first and Scale adds additional functionality for Apps and Virtualization. I am certain improvements will be made over time.

Pros: By using scrubs, I know that drives going bad can be spotted early, and it can be replaced and insure that data is preserved. Before getting this system, I had photos that were ruined by bit rot (it developed a color stripe down the middle) that I could not correct in Photoshop.

Cons: This is not a backup solution! ZFS running on BSD will let you do stupid things with the setup, so go to the TrueNAS forum to check what you are about to do to insure no self inflicted injuries! I have my systems set up as RAIDZ2. RAIDZ2 allows the failure of 2 disks before data loss occurs. That does not mean you can leave it with 1 dead drive and fiddle around to replace the bad drive, but in case another drive goes belly up while the re-silvering process (rebuilding process for the replaced drive) you are still covered. I know of people who where rebuilding RAID5 arrays have had another drive die during the re-silver process and have lost everything.

Overall: Although this a wonderful method of storing data, one does need to follow the minimum requirements when putting together a system. Remember, you can never have too much RAM. I have purchased my first FreeNAS 32 GB RAM, 8 bay, 4 TB drive system that is still running fine and later purchased a TrueNAS 64 GB RAM, 8 bay system and populated it with 8 TB WD Red Pro then set up the system. I am in the process of buying 16 TB drives and upgrading my new system, then I will take the 8 TB drives and upgrade the old system with those drives.

Pros: Fast and stable.
zfs configuration via user interface is very useful.
Reliable reporting.
Easy to setup app/charts.

Cons: User interface design isn't ideal, specifically setting up the charts/apps.

Overall: I've been using TrueNAS scale for about 1 year now. It's been rock solid, no issues. I use it as a development server as well as media (jellyfin) and I really have no complaints.

Pros: Good ZFS File system, amazing communities.

Cons: TrueNAS is built for commercial systems, which may be limited in terms of hardware a user can use.

Overall: Good GUI, good support, good speed, good everything really.

Pros: Mainly the ease of use, but the flexibility of the software I also consider somewhat of a plus, the both add to the overall experience.

Cons: The fact that some applications have to run in jails.

Overall: Coming from using a server OS vs NAS OS adjusting to how it functions in comparison, was somewhat of an adjustment.

Pros: I have been really happy with the performance and features. Many more than I know what to do with. Updates are now seamless and my system is very robust.

Cons: Prior versions were not straightforward to update (FreeNAS).

Overall: Excellent. I have been really happy with the performance and features. Many more than I know what to do with. Updates are now seamless and my system is very robust.

Pros: Easy installation and setup.
Good performance.
Very reliable.
Good UI.
A lot of protocols and addons supported.

Cons: The gap from a free install to a payed solution with hardware is quite big.
There is no SMB option that is cheap enough to compete with solutions like Synology or QNAP NAS.

Overall: Installation and setup was very straightforward and easy. The UI is structured and clear and was easy to use. Creation of a storage pool, volume and share took me just a few minutes. The performance on a mapped network share on windows was very good, even while using very basic PC hardware and just two old SATA HDDs for the NAS. On another system where I used even older hardware one of the drives failed. The resilver was easy and worked just fine. No data was lost.

Pros: Interface is easy to navigate, and online community tutorials are prominent.
Webpage shows a great amount of detail into the product.

Cons: These video/written tutorials could have a centralized place on TrueNAS' website.

Overall: The interface is very good so far, I have explored a small amount and will continue delving into containerised workload solutions.

Pros: Fast, free and formidable. I currently cannot thing of more words that start with f. Fabulous? Fancy? Fantastic, thats it!

Cons: Nothing to see here folks other than a feeble attempt to leave a wordy review... I am a little embarrassed because I am meandering down the river of mindless speech.

Overall: Excellent since it is free as there are no expectations other than the normal ones you would get with a free product. You see I could go on a bit about the whole thing, but that would not be the entire tale worth telling.

Pros: They have a free version so you can play with it and learn how to use it effectively. Works well even with minimal resources. Even if you put it on an old computer to work as a home server, it works very well.

Cons: Really I don't know of any cons to TrueNAS it works great for what I do.

Overall: Excellent server. I have no complaints which is rare ! :) I have been using TrueNAS for several years and it rarely needs any maintenance. It simple works and keeps working. Try it for yourself, simply download the ISO, load it into a VM or an old computer and have fun. You will be amazed at how much it can do.

Pros: Free, ZFS, dashboards and connectivity to other tools like Grafana.

I have multiple drives and continue to use an old chassis. You can build I out as expensive or budget.

Cons: Nothing I can think of at the moment. Can you think of anything.

Overall: Will continue to use until compelled to use something else for all the reasons I stated above.

Pros: Data redundancy.
Ease of use.
Plugin architecture.
Scalable.
Enterprise grade.
Supportable, with a very large community base.

Cons: I wish it still had enclosure support, as well as MPIO support.

Overall: I've been Using TrueNAS / FreeNAS for a VERY long time...over a decade. Very happy with the product. In fact, I've never EVER lost data. A lot of people and businesses I know have lost data with even traditional hardware RAID. Not once with TrueNAS.