Incredible! Gigantic but in a way that doesn't feel daunting. Very consistently satisfying puzzles - almost always hit the right balance for me, in that I had to think about everything but almost never felt frustrated. Only the robot part felt tedious, but the fact that I noticed that testifies to how engaging the other 97% of the game was. And the plot was interesting, mysteries gradually clarified themselves over the course of play in a way that felt natural. Very highly recommended.