I thought American Cannibal did this better.
If you like GWoS, be sure to check out "American Cannibal" - the same idea, but a out year or two earlier and about reality TV. Also, a much better film in my opinion.
Real People trying out for a real reality show run by (possibly fake?) writers whose lives are documented on camera.
The plot points and character descriptions are even similar.
I just rented it off next Netflix.
I reccommend American Cannibal much more than Great World of Sound which i just got back from seeing.