This is a little straightforward, but I don't like most of Watase's works at all. I read some of her more popular works and they just aren't exactly to-die-for. The slice-of-life school life and the dramatic demon-fighting guns blazing, for the mangaka, should be separated. She doesn't do a very good blend of both genres; not to mention, it's in most of her works and it's become quite boring to read.
The mangaka does the school life genre really nice. It's a nice and light touch on the everyday social life. If she did one manga entire on school life based on her "Fushigi Yugi," "Ceres: Celestial Legend," and "Alice 19th" works, I think I would find it as pleasant as Fruits Basket. In fact, I loved her Imadoki! manga. It's absolutely beautiful and it's very sweet and simple; it was entirely on social life, such as school, home, and work.
Her save-the-world genre isn't bad either; I have to admit, she's got a pretty vast imagination. I appreciate it, but like I have said before, Yuu's blend of the two just doesn't quite do it for me. I don't know if she's doing anymore manga, but I do hope to read something more decent in the future.
This manga, however, was pretty boring to me. There were scenes, or rather pages and even chapters, where there were a lot of dialogue, information that the reader needs to absorb to understand what's going on. So for me, if I scroll to the next few pages and just a crapload of dialogue, I usually just skip over because they don't usually refer back to that "important" info. And then!...there are other scenes (or pages and chapters) of just fighting and the movements are extremely hard to follow so I just skip over them also. This work has the usual boring romance the mangaka is obsessed with. Know this: if you read one of her works, chances are, the other one is gonna be very similar. I do, however, recommend this to anyone who is really into super cheesy romance manga.