Overall I enjoyed it; didn't really manage to live up to the bar set by Underground Blossom - some of the puzzles were obtuse, or really dragged, or were tedious to get through - but the story really came together on Day 3, enough so to bump it back up from 3 to 4 stars. Correctly predicted the twist about the player's identity, which was fun. Will hope that the next one comes closer to UB, though.
I haven't collected all the achievements or done the post-game, but I'll come back and edit the review if my opinions change once I have.

Edit: done the post-game and the achievements, and yeah, no serious changes in my opinions on the game. Wish we could've gotten a surname for Kate and her brother - or at least a name for the brother, especially after that postgame - but oh well, maybe in a future game.