I got mine as part of the initial pre-order wave in October and I've been very happy with it... works for non-steam games as long as they are added to steam, such as Minecraft... also worked adding a web Browser to steam and surfing the internet (though streamed media like Amazon Prime Video was choppy and unwatchable).

The kids love it too, and it means that they can now play games "on Daddy's computer" in the lounge, instead of upstairs on my gaming PC (and Steam Family View means I can restrict what games they can play).

Occasionally I have to go upstairs to troubleshoot something... Zone alarm in particular can cause some headaches, but I've not had any issues with the link or steam crashing that other reviewers have mentioned, and it always finds my PC on the network (my wife's laptop too, but that's not great for streaming from!)

Some things do look a bit different, whether that's because I'm used to seeing them on a monitor, or because of the compression that goes on as part of the streaming, I'm not sure... in particular it was hard to tell the difference between some of the blocks in my inventory in Minecraft..

So far I've tried a fair few lighter games including Minecraft, Portal 2, Peggle, Pinball FX2, Sonic Racing Transformed and Gauntlet, and all have been playable. I intend to try some more demanding games soon, like Shadow of Mordor.

My only major gripe at the moment is the absence of voice chat. You can pair a bluetooth headset with the steam link, but so far no audio is output to it. I believe this is in the pipeline, so I am eagerly anticipating that. Therefore, for now, I'm not using the link for online multiplayer games.