Inception was easily the best film I viewed this year, though admittedly this has not exactly been a banner year for Hollywood. I found Inception to be intellectually challenging, and I had to work to keep up with Nolan's efforts to distort and bend reality.
There were a few moments where my ability to suspend disbelief wavered, especially the way that the character Ariadne (played by Ellen Page) seemed to know much more than a rookie dream extractor/architect should know. Of course, I know nothing about dream extraction, so I suppose I cannot fairly critique someone more skilled than I in matters oneirological.
Part heist film, part science fiction, and part five-dimensional chess game, Inception is well worth the first-run cash, and you will leave with more questions than answers. For some folks, such a film is frustrating, but for those filmgoers who like to be challenged, Inception works on more levels than most films you will see this decade.