As far as I'm concerned it's the best of Mike Judge's creations, and who knows, perhaps it helped influence The Office, after all it predates it by 2 years and it certainly covers much of the same ground.
Amongst the many great characters is Milton Waddams, who has already featured in a series of cartoons on Saturday Night Live. However, my favourite is Lawrence, an awesome guy played by Diedrich Bader, who not only has a foam beer cooler but also sports a bottle opener on his key chain. What a dude. Throw in a great gangsta rap soundtrack, combined with laughs that come thick and fast, and you've got a movie that shouldn't disappoint.