I'm surprised someone made something like this, well, it's not the first time (DJAngel gave it a somewhat lazy shot in the past) but a web based application is something I didn't see coming, and a stable one at that.
I agree with the fact that something easy to get, and that anybody could have is bound to get old pretty fast, since the point of making them was to be totally possessive over a character for many, with this, I'd guess that feeling is crushed.
Letting aside all that, the app is damn good at what it does.