Both episodes of Clerks were hilarious, but not uniformly so. There are parts of both episodes that dragged, and parts of both that actually kind of shocked me. (Randall explaining to the jury how alike they and Dante are; the Indian convenience store). My friends and I, while enjoying the show immensely, realized there was no way the average viewer would even understand much of the cartoon, let alone appreciate the in-jokes and find the whole affair funny- in fact, there are parts of each that many would find downright offensive. While we wish the show would have continued (and perhaps with more equal competition, the show could have matured into something really good), perhaps it's best that the shows just come out on video for the benefit of the converted.
My main problem with the show was the stylistic similarity to "The Critic"- most of the jokes were not only pop-culture based, but they were essentially non-sequiters, contributing nothing to the story. Their use in the original movie fit in with the feel of the film- that of bored coworkers who are just killing time. They felt awkward, though, nestled in the sitcom-like plot of the cartoon.
All in all- recommended for the Clerks fans out there; everyone else may want to see the movies before seeing the cartoon.