I agree about the Dubai sequence and I was seeing it in IMAX until I got a call from my neighbor that sparks were shooting out from behind my shrubs. She wasn't home and her 13yr old son was trying to find out how to unplug the lights sitting atop the shrubs. I live 5min away luckily.
Ergo, I left the movie as the whole satellite uplink sequence was wrapping, just in time to see the missile launch. How much time was left in the movie from there?
Once I see it fully I'll add it to my list.
Also, Simon Pegg was great.