Basically perfect if you ignore Jun Maeda's routes (Makoto and Mai) and focus entirely on Naoki Hisaya's routes (Shiroi, Nayuki, and Ayu), as it suffers from the typical Key problem of routes from different writers having an entirely different vibe. Maeda's stuff just seems over the top and out of place, compared to Hisaya's more realistic stuff. Of course, they all have magical elements like a typical key game, but Hisaya hits a sweet spot and I think this is his masterpiece.