I agree with the reviewer that IMAX is overrated. Just seemed like a bigger screen to me, certainly not worth extra money (seeing as this title wasn't in 3D).
As for the movie, it was good. Not great, not bad. Overall, it didn't live up to the hype and possibilities. I was expecting something along the lines of a less sci-fi Matrix, but instead felt like I was watching a remake of Dreamscape and Flatliners rolled into one.
The movie drops you off in the middle of the plot, kind of like a dream, which in retrospect, without spoiling anything, was very likely intentional, but it does leave you scrambling to figure out what's going on from the get go, which I found a bit frustrating at times.
Overall, worth a watch, as long as you don't go expecting the movie of the decade.
No Spoilers Here - Like Batman Begins, this isn't your typical "Super Hero" movie. Chris Nolan forgoes the formulaic Good Guy/Bad Guy ultimate showdown plot and delivers an amazing crime drama along the lines of Heat, except with costumes and gadgets. The plot doesn't rely on special effects and gratuitous violence to tell the story, although there's plenty of both. Everything you've heard about Ledger's Joker is true and then some. If Hopkins can get a Grammy for Silence of the Lambs, then Ledger is a shoe-in for Dark Knight. Absolutely amazing movie.