I have, and it's superb. Very moody and immersive, also quite surprising. The atmosphere as well as the sheer aesthetic design are absolutely superb. As a 2.5D puzzle game it's more on the easy side of things but it's quite nice all the same - to me it's the experience that is worth the most about it.
In years of lurking, this message board has achieved legendary status for game advice. Bought and installing even as we speak.
Seriously, this is my goto place before I purchase stuff.
Well, I haven't been around here for long so I can't speak for the rest of the users here. Just take it as my personal opinion! :D