It all depends on your taste in pizza....
If you are a fan of pizza chain (Dominoes, Papa Johns, Pizza Hut, etc.), then you won't mind Disney pizza. I've been to Pizza Planet every trip (3 times) and always liked it. Definitely not something I crave, but still satisfying.
If you prefer the fancy kind of pizza you see made on the cooking shows on Food Network, then Wolf Gang Puck Express may be more up your alley.
My wife and I tried it last year for the first time and ended up eating there about 4 times total in our 10 day trip.