Initially I thought that this anime was horrible but I had to change my mind. The story in general is very well managed and the characters are very interesting to follow. I could call it one of those few yuri that is worth seeing (as opposed to Citrus).
The romantic element of the story is very well managed and is not trivialized at all, in fact, I was almost surprised by the management of some scenes. However we are not talking about a perfect anime, obviously, it tends to be boring in some scenes but nothing serious. Personally I found the comic element of some scenes annoying, which seemed to me to be slightly forced. Kanade Sakurai is the one I prefer most among the twins, maybe because I find the character more interesting. But these are just personal tastes.
I was surprised that the relationship between the two remains platonic. For some it could be a minus point but I prefer something simple rather than scenes full of ecchi but without romantic content.
I recommend it for those looking for a shojo-ai story that is not complicated to follow and does not leave a bad taste in the mouth.