It's very close to being great, but it's hard to make a great anime that's based on a visual novel.
The animation is good and the episodes are entertaining, so if you're like me and that's all you really need then this is a really good time waster. But out of the 8 boys only 3 of them are really paid attention to and 2 of them hardly register as characters. The main girl also gets pushed to the side during the main conflict and her skills don't help in the resolution of the story at all which makes the whole ending feel weak.
I wish it had been split into two seasons so there had been enough episodes for all the the characters to be relevant in more than one episode, including the few side characters that were obviously only included because the people who played the visual novel would have been mad if they weren't.
Overall it's a decent show that I enjoyed watching, but I doubt I'll remember it for very long.