Aha, sorry if I came off really negative; I'm not trying to discourage people from playing the game!
In fact, out of the 3 routes I've played so far the only really bad thing I can say about the game is Kudo's route (I actually enjoyed Haruka's route A LOT). From what I've read, all of the individual routes are supposed to be pretty disappointing anyway. Refrain is supposed to be good enough to more than make up for the mediocre routes.
Yuiko and Mio left until I can finally get to Rin!
I've heard that getting Rin's bad end affects her behavior in the other individual routes but I haven't done that... Shouldn't be a big deal, should it?
Also, I've been using a text hooker to play the game so there were a couple of details I wasn't clear on in Kudo's route...