Worth it! Took 72 hours for 100% completion.

Fun!

These are fantastic and very well made puzzle games if this type appeals to you, but this one in particular I would definitely play last in the series, as it has some frustrating aspects explained in more detail in other critical reviews. Essentially the entire puzzle is one instead of being broken up in smaller, more manageable and satisfying chunks like the other games made by this developer. If you enter the series on this game, you will likely find it frustrating and miss out on a series of otherwise excellent puzzle games.