Well, it isn't a great game, but it is enjoyable. It isn't a game I would recommend like I do with True Love. Besides, it's a dating sim, so you won't get a deep story like a VN (just in case it's a problem to you). I'd give a 6.
And Caelitas, I wouldn't say it is that bad, but the English dub and the design may be a bit annoying. The gameplay is good imo, though. But you need a lot of time to see the endings, since you have to build your stats a little before reaching most of them and you have to start all over when you finish a character's route. So maybe most people won't have the patience to put up with these problems.