Christopher Nolan pours his complicated dream world of ideas down on us from the set-out in this visually astounding braggart of a film. There's hardly a scene in Inception in which the set designers and optical effects personnel don't get a chance to shine, resulting in a film so photographic and dazzling that the high amount of details present and lacking in Nolan's story/setup may easily be moved to the background. At times this is a good thing, because for all the complexity in the film's idea of dream-snatching/planting/sharing, there are abundances of logical flaws - questions you are not meant to ask, issues which are not meant to be discussed. Incidentally, these are often quite basic and relevant questions, such as how the actual interconnection between the dreamers is achieved, or how it is that an idea conceived in a dream is something which turn out guiding our entire lives. I've never known dreams like that.
Inception is over-populated with talented performers and soaked in scientific talk and ostensible existentialism/intellectualism. This may make it impressive at first glance, but I suspect viewers will be divided into two groups: those who indifferently accept it and those who somewhat annoyed challenge it. What they'll probably have in common is that I doubt neither group will be really inspired by it, despite the fact that the story, which appears more basic and less innovative the deeper into the dreamworld we get, has got elements of fine writing in it. The ending is the only moment in the film in which Nolan shows real class. Whether it's worth waiting two and a half hour for, is up to you.