I found it a great film, to be honest for the time it was made. It truly blowed my mind, as those kind of movies are quiet rare to see.
I've watched plenty of other movies from that era and none have come close in terms of that "cool" factor as Fight club did.
Even if you watch it once, you'll probably miss the little "hints" that are put ahead on the movie, i wouldn't want to spoil it but a little searching on Imdb will help