This movie seems to be Matrix with a cheap twist. There was too much effort trying to make the movie "complex" and less on trying to build a plot. I find that people love this movie because it has the false appearance of one that is confusing when in reality it is fairly easy to follow. People tend to like the pseudo-intelligent boost in being able to follow a simple movie with the false appearance of being complex.

Southpark put it best in their take on it*:

Sharon: Just because an idea is over convoluted and complex doesn't make it cool. Going into multiple dream levels sounds like a really stupid idea. Cobb: You don't get it because you're not smart enough.

*(Season 14 Episode 10 - Insheepsion)