There are a few of us that wished Nolan hadn't wasted his time on the Batman crap. 'Following' was quite good, and this one made use of a great group of actors at the top of their game. I think you have to give it to Pantoliano for being the glue that kept the whole thing working. For some reason it doesn't seem to reward multiple viewings.
I do find this a somewhat smug film, made by smug people for smug cine-elitist AKA This film is a C*NT magnet, not in a good way. It does have a good performance by Guy Pearce, the directors imprint is very clear from the great Nolan. Yet this film is essentially a gimmick, So the film is backwards? When we talk gimmick, I bet no one gives Friday 13th Part 3 in 3D the same love, yet it still relies on the gimmick.
A vicarious experimental experience, subjecting the spectator to Lenny's short-term memory loss ('condition'), through the non-linear unravelling of the narrative. Dramatic irony is reversed, suddenly characters know more than Lenny and the audience. Enthralling and unique.