Like so many of these sites there is some good stuff and some really bad stuff. I did watch at least one sort of claymation bit that was not only pretty humorous but really incredible in terms of the animation, characters expressions and the actors. However, I also watched several other animations and found them overall to be nowhere near as entertaining and often just plain stupid.

This site is fairly good. Most sites will not let you look at there stuff without regestering or loging in first.