A film does not have to be 'great' to be important.

Rating: 10/10 (8 January 2003)

Just reading through some of the comments below convinces me that Mulholland Dr. is a significant work.
It's not that people are simply divided over it: some believe it is a masterpiece/milestone in cinema history, while others believe that it is the worst thing ever made.
Personally I love the film, and I do not claim to understand why so many people dislike it, but I am delighted to see that it remains provocative and hasn't become an instant 'classic' like so many others.