I enjoyed Hop. Quite a bit, actually.
The characters are absolutely ADORABLE. If you like bunnies (and who doesn't), you MUST see this movie. The blending of animation and live action was so seamless, it was impossible to imagine that the rabbits weren't real. And it was very hard to believe that the Easter Bunny was voiced by House (Hugh Laurie). The writing and dialog was decent, though not at all outstanding, however I laughed at quite a few points during the film. And the whole jellybean thing? What you see in the trailers is it. Those two little scenes and that's all.
Some advice for James Marsden: Jesus, man, lay off the caffeine!
I brought my E.B. plushie with me to the theater. I heard quite a few "Oh look, he's got an E.B. plush!" from kids and adults alike. I also overheard one woman telling her boyfriend, "You should have brought your Hop bunny!"