They are good, but not perfect. But then again I'm the kind of person who will happily spend hours customising an avatar in other games (Sims, Guitar Hero etc). So as good as the options are, I find some are limited.
I also have a love-hate relationship with the skateboard options, why oh why do the guys get a choice of 3 Skateboards on the girls only get 2!?! Saying that I still got one for my Avatar, just don't use it anymore.