Everyone you've heard talk about it are WRONG.
No, not really, they're entitled not to like it I guess.
It was written and directed by the guys who created and starred in Reno 911, another great movie.
I just looked it up on IMDb and I'm in awe at how bad it is being rated and reviewed. This movie seriously has some very convincing and unique comedic value to it. The acting is great, a lot of the jokes are subtle (which I love in movies and TV Shows) and the subject matter is something I'm a fan of myself, although I don't believe that is clouding my judgment at all. I recently saw another movie called Ping Pong, which was also a comedy, but it was Japanese, and even though I love ping pong and a lot of Japanese humor, I didn't think it was all that great.
Also, Dan Fogler, an actor I've never seen before was the main character, and made an amazingly convincing character.
This is possibly the most underrated movie I've ever seen, and it makes me sad. Not many movies make me laugh out loud when I'm perfectly alone.