Some of the gags in this film were quality - Robin Williams is at his comical best. I'm not saying it's Williams' best ever film (cough good will hunting cough) but certainly he's never been this funny. His gag about the abnormally shaped cookie was so funny. In fact, i've never laughed this much since Dumb and Dumber.
Edward Norton was actually very believable as the clean cut good guy. I didn't expect it from him after watching Fight club and American history X but he carried out his role really well.
Catherine Keener also looked really beautiful, she played her power-hungry turned nice chick character to a tee.
Even though the story is about a kids show, there's a lot of dark comedy in it e.g. the involvement of the Irish gangsters (by the way also very funny) showing what a good job Danny devito has done directing this film. Credit to him. All the characters in the film served a purpose and above all, did it well!! All seemed believable and Robin Williams was the star.
If you watch this film, persevere for the first 20 minutes because after which the jokes and plot come in hard and thick.
Top stuff, rent if you want a comedy with original storyline and a little bit of good humoured smut thrown in for good measure.