Clever use of flashbacks and black-and-white segs help define events in time. More than normally required mental exercise is more than worth the effort.

Wow, very well made movie. Very intelligent, well directed and fantastic style. It's great how you try to figure everything out, and become a detective yourself

Interesting up to the point where you realize just how much of a regular movie this is. The concept of an amnesiac protagonist is portrayed creatively enough, edited to reflect the broken psyche of the hero, but it wears thin, revealing the standard movie lying underneath

The structure may be a bit of a gimmick but the execution is near flawless. Every scene has you asking questions that are answered in the next one and the whole film is one gigantic puzzle. But the best part is that the joy isn't in piecing it together, but in examining the way you piece it together. The shifting perceptions and motivations, the half truths and uncertainties, the parallels between the viewer the characters and the world at large, all give the film a life beyond its own story.

Enjoyable, but terribly overrated and completely over-hyped.

Fantastic

This film confused me so much, I couldn't tell if I liked it or not. It's an interesting idea that definitely warrants a watch.

Innovating, original, AWESOME! This is perhaps one of the most original movies I have ever seen. Guy Pearce is fantastic as Leonard who because of his disease is in a permanent state of being out of the loop. Joe Pantoliano is great as Teddy. We never really know if Teddy is a good guy or not and that is mostly because of Pantolianos great acting. Christopher Nolan shows us why he is one of the best directors around. Filming the movie in reverse is simply a stroke of genius. A clear must see.

Fantastic. The acting, writing, and direction are all superb.

Holy crap, I feel like someone just took an entire season of LOST and distilled it into 108 minutes and injected it into my veins

defining a new time language is hard but they pulled it