The movie combines a classic question of "what is reality" with engaging action sequences. It was a nice divergence from recent years of futuristic/technology-based films focused on alternate reality --the concentration on dreams, a natural and fascinating part of our lives, made it seem plausible. My only critique would be that given it was set in dreamworld, there was an opportunity for it to push fantasy - it mimicked real settings/accepted "reality" rather than obscure/bizarre happenings that often occur in dreams. The cast and acting was great.