Biggest criticism "Inception" has recieved so far is that it's to smart for mainstream movie goers.
"It's a challenge and a minor chore to follow Nolan's cerebral lead, but anyone complaining that Hollywood lacks bold inspiration can shush for a while." St. Petersburg Times
"No matter how high your personal expectations for "Inception" may be, the film not only meets but wildly exceeds them." eFilmCritic.com