Went in blind expecting yanderes, ended up getting enough doki dokis to last me until Christmas.
Tried single-mindedly pursuing a Yuri route but, uh, that didn't go as well as I'd hoped. Then I made the mistake of listening to Monika's endgame insights for so long that I didn't want to delete her. As a relative fan of VNs and games with a meta element, I didn't mind the comparatively uninspiring 1st half, and part 2's fuckery on tenterhooks more than compensated for it. Strongly positive feelings overall, though I probably wouldn't have warmed to the cast outside of this setting. Well, maybe Just Monika.
If you run a completely fresh game, delete Monika's character file and then click New Game, some stuff happens.