This is a good movie for children, but it does have numerous flaws, however.
If you're over the age of 8 you most likely won't enjoy it.
As previously mentioned, at the beginning of the movie they just whip out guitars from out of nowhere and start playing like pros. Without amps or anything.
Then there's the whole magazine thing. Seriously, it costs money to start running a magazine. But they got it done by the end of the day...? Then, when they go to London, they cam't get into the concert because what's her face stole the tickets. So they decide to form a band in under an hour and get in. But before doing the most logical thing, like you know, writing a song, they go and shop for "punkalicious" outfits. Then when they get there they go up on stage and play like pros. And all of them play guitar. But I can hear various other instruments.
Then after the concert everyone is happy, and guess what? Their song is number one on the charts! That leaves me to ask further questions like, how'd they get a contract so fast? How come hoards of fans don't follow them around int he episodes that follow the movie? Those questions and various others will go unanswered.