Rock 'n' roll comedy does have some laugh out loud moments.

Rating: 7/10 (1 June 2013)

After achieving fame on the TV series 'The Office', actor Rainn Wilson here shows himself capable of carrying a feature film, in this vehicle. It's got some heart as well as some degree of silliness, and it doesn't conclude as well as one might like, but it does do its job, and keep entertaining the viewer for a well paced 103 minutes.
Wilson indeed is playing the kind of part one could also easily see Jack Black playing: Robert "Fish" Fishman, wildman drummer for Vesuvius, a rock band on the rise, whose bandmates cruelly kick him out just before what could have been a life changing event. He spends the next 20 years bearing a grudge and deeply resenting his lot in life when an opportunity presents itself. Fish's nephew Matt (Josh Gad) is keyboardist for a high school band named A.D.D., and they need to replace their drummer in time for the prom.
In record time, this band begins to take off, and the members - also including singer / guitarist / creative force Curtis (Teddy Geiger) and bass player Amelia (Emma Stone) - find themselves having to deal with a crazed Fish desperate to live out all the decadent rock 'n' roll dreams he never got to realize before.
Ultimately, this is a pretty, if not entirely, predictable affair. At least it doesn't act as if a romance between Fish and Curtis's hottie mom Kim (Christina Applegate) is inevitable. It goes utterly over the top in the early going (that bit with the incensed Fish pursuing his Vesuvius bandmates is priceless), but for most of the rest of the picture, it's a little more down to Earth.
Wilson proves to be fearless (witness the naked drummer routine) and delivers a performance of true enthusiasm. His castmates are equally appealing. Jeff Garlin has his moments playing Fish's brother; also co-starring are Jane Lynch, Jason Sudeikis, and Howard Hesseman; it's hilarious to see Will Arnett, Bradley Cooper, and Fred Armisen in long hair wigs as they portray the other members of Vesuvius (and affect ridiculous faux English accents near the end). Appropriately enough, Pete Best, the man infamous for being the drummer fired from the Beatles, has a cameo.
Overall "The Rocker" is likable enough and amusing enough to qualify as agreeable entertainment while it lasts. It may not be terribly memorable, but it is quite easy to take.
Seven out of 10.