Okay, I just watched the first episode. I'm extremely satisfied, as expected there were lots of adaptations, as expected of an... adaptation. I believe they'll show all the routes, or there'll create a totally new story. Either way, I doubt they'll focus on only one character, I'm so happy.
Okay, so, let me do a quick review:
Art - I'm more than satisfied with the art, although some minor changes happened, I think the characters essence is still there and Makina in particular seemed better on the anime. I give the art a 10.
Animation - No complains as well, the regular moments flowed perfectly and the comic scenes (Michiru being a dumbass) used the classic exaggerated style, but didn't got to Kill la Kill style, if that even makes sense to someone. Easily a 10.
OST - They are using the same OST as the novel, do I have to say anything else? 10.
Story - As I said before, adaptations were made but I don't dislike them. I won't say that there weren't scenes that left me wondering the reasons for those changes to happen, but I do have high hopes either way. The pace was good as well, considering only this episode, I'd guess they'll do something like Yosuga no Sora did, showing all the routes or they'll somehow show all of them using a different story line. I'll go with a 10 for now, let's hope they don't disappoint us.
Complain - Okay, even if I gave everything a 10, there was actually a bad point: Unnecessary fanservice. I do know japanese people have something with panties but most of the times, there was no need to show us them.