Don't get me wrong, I liked the film. But it just wasn't great. This illustrates my thoughts on it in a rather funny way.
It's cool if you don't think it was great, dude, I just take issue with saying it's "too gimmicky". It has a gimmick, sure, but it is very obviously not just a random decision on Nolan's part to create a buzz for the film. I've never seen Irreversible, though I will try and check it out at some point now, but I highly doubt it's non-linear structure has a direct relation to the way the main character's mind works.
There is a way to watch it in chronological order, and it's still a good movie that way, but it doesn't have nearly the same impact.