I enjoyed the nerdy video game references that were sprinkled throughout the movie. I enjoyed the acting and actually for the first time sat through an entire Michael Cera movie which is an accomplishment on its own. I just turned off Youth in Revolt halfway through the other night.
Now that I didn't like with the film was that pacing was a bit slow in between the fights with the evil exes and the band members were sort of annoying throughout.
I did enjoy the small special effects such as "KO" and the points after each fight. It made me want to play video games after I was done watching it. I also liked the way that it ended.
I would give this film a solid 4/5, and considering that I have heard things about the movie, it lived up to my expectations.