This is a fun, well-made family's movie with good intentions. It's based off of the once-popular Disney Channel series "The Famous Jett Jackson," which I used to catch on TV once in a while. I always considered it the best of the Disney Channel TV shows (the rest are all mostly lame and unfunny and repetitive) and the movie adaptation is acceptable for what it is.
The best aspect is that the film approaches the series with a fresh idea and manages to come across as a child's version of "Mission: Impossible." It begins with Jett (Lee Thompson Young) deciding to quit his famous role of teen-agent Silverstone, a top-secret action hero. However shortly after quitting the role (at the disapproval of friends and family) he's struck on the head and lapses into a long dream wherein he IS Silverstone, and no one else seems to believe he's an actor.
In his dream, the villain Kragg (Michael Ironside, devious and menacing as usual) has perfected a means to travel between universes, and Jett has to stop him before he invades the "Real World." This movie is nothing special and it's just a made-for-TV Disney movie, aimed at kids, so it has to be graded as such. Lee Thompson Young is a fine actor and has charisma - he handles the action sequences well, no matter how ridiculous they are.
In the end it's easy to smirk at this and be a cynic, but it is intended for children and as such works well within the restraints. Of course the concept is silly and childish, but that's the point. It's enjoyable, unpretentious and isn't insulting like the other Disney "Original" Made-for-TV films.
Worth catching if you see it on TV sometime, providing you have children. (Or are a child at heart.)