(The 7/10 rating is just to counterweight the movie snobs who rate this movie as if it was meant to be freaking Godfather part 4.)
Honestly, everyone should chill and live a little. This movie is no masterpiece, but it was not meant to be one! The target audience are tweens - for whom this movie is perfect for. And, in fact, I myself enjoyed this piece quite a bit (at the fragile age of 17).
The idea is basic, let's be honest. However, the execution and the acting (in particular by Sarah Hyland) are definitely commendable and noteworthy. The style stands out from that of other 'mass produced' Disney Channel flicks (such as Starstruck, 16 Wishes, etc), with the occasional cuts to the footage supposedly from Josh's camera. It definitely does a lot to give the movie its own identity, and with it the chance to stand out from other, mediocre, productions.
As a side note -- this is one of those 'feel good movies'. If you are not a movie snob or a hard-ass geek, then give it a watch, even if it's just for laughs. You will (probably) enjoy the experience (if not the movie).