A lot of great action. Tom Cruise seems a bit old for these stunts and of course most would kill the average man. The movie is a bit long and also a bit confusing with masks, evil people and location changes. It was just "OK". If you like this kind of movie, wait for the next James Bond.
The overall plot is of course not realistic and the whole comedy routine comes from the fact that the movie is about stoners. The nice part is the relationship that grows between the drug dealer and the buyer. They really do end up caring about each other and will go to great lengths to save each others lives.