Took me a minute to think about merits of rating. In a sense that 5 stars would be a "masterpiece, one of a few" - that's not it. However, if I took a more laid-back attitude here and understood 5 simply as a "quality story, totally worth it's time" - that would be exactly it.
Looks good, story holds, girls are interesting and with personality. Classic types are sneaked in here and they can't hide (there's your "cheerleader alfa perfect beauty", "shy quiet ardent romantic" etc.) - but it's done not in a gaudy, banal way; they don't feel at all like a walking stereotypes, it's just enough. I liked that.
One of the not-so-good things that causes mixed feelings is the way the "routlessness" of it works. Now, free choices in itself are good - it's immersive, it keeps you engaged, I much prefer it to a passive kinetic lock. The problem is, here it feels like it makes you to constantly miss out, as if those choices don't quite interact with each other in a congruent way. On a threesome "path", there are moments where you have/can pick one of the girls, which is treated in the same way as if it was only her, which leaves you effectively blindsided to an equivalent bit of story from the other girl, and there's really no reason for it. I don't think it should be like that. I feel if you go A+B it should converge into AB, rather than arbitrary piece of A + arbitrary piece of B the way you want to stitch them. Didn't try to harem, but I imagine this would feel even more split up there.
The second thing is that it doesn't quite feel like there is enough intimacy with whom you are going for - not in quality, but in quantity. Truly, I'd say this is - in at least an equal part, if not more - the story about a group of friends, rather than a love story. Which implies harem (if you are with all of them - it's a constant love story, right?), BUT then you run into abovementioned issue of "partiality". Moreso, there's NO harem ending. Which implies the opposite?... So what is it? It feels a bit confusing and not quite put together in that way.
All-in-all, I say it's a pretty good slice-of-life (but not a long one) with a decent replay potential.