Definitely another twisty thriller. I actually think it's pretty easy and straightforward throughout this film to see what is happening and where it's happening (reality, dream, dream within a dream, dream within a dream within a dream). There are some subtle details about the plot or action that could be more fully explained, but basically you should be able to follow and understand the gist of everything that goes on. I think "Memento" is probably a slightly better film, although I gave that 4 stars, also. A lot of this comes across like one of Hitchcock's more adventurous flicks, or a Bond flick, with people skiing all over the Alps or wherever, being chased by bad guys. That sort of business goes on and on here. But the interesting characters are really what make this worthwhile. I don't know that this film asks or answers any particularly deep questions about reality or experience or life, etc. It's just a good movie.