As you can imagine, this is an extremely predictable film with a pretty generic script. Nonetheless, the actors make valiant efforts to save the movie, and in the end this actually ends up being a really fun and relaxing flick. The portrayal of recording labels as being comprised of evil, profiteering losers is pretty fun (despite them not being nearly evil and dumb enough), and the original music is surprisingly good. Generally speaking this is a great movie to watch with friends.
In a sentence:
Formulaic and predictable film + Rainn Wilson and Emma Stone = really fun film!