I finished Obduction. Sort of a weak ending, but very interesting overall.
There was one bit that was such a pain to get through in terms of puzzle, in that the solution when seen wasn't hard but to execute it was almost game-breakingly repetitive. The whole game had a very weird vibe that I liked, and the VR 'puzzle world' thing was fun, but a couple of misteps sort of spoilt it a bit.
EDIT: I should say, it's fine without VR too - you can play it with mouse/keyboard just fine in 2D. If you liked Myst or The Witness then it's worth a play for sure.