The character development in this movie was awful. I simply did not care if either Clooney or Bullock died in the film, because I had no reason to. No emotional investment. The only attempt to add depth to Bullock's character was pure Hollywood cliche.
I'll stop beating a dead horse, the story was very thin, and was a total letdown compared to the fantastic cinematography.
Sound: My first experience with Dolby Atmos. Saw this in Regal RPX and it was hands down the best sound I've heard at the theater. I think this had more to do with the speakers used, which sounded very natural and did not exhibit the thin and shrill sound I'm used to hearing at a common theater, or the loud and strained/distorted sound at our local IMAX which plays movies at ear splitting levels. Atmos did have a very full 3D sound field.
3D: While well done in this movie, the image was still too dim. This was with a brand new digital projector. Also, there were numerous objects moving blurrily along in 3D that only served to break the immersion. Current technology in projectors and plasma can give a 2D image so much depth and punch that 3D is just a moot point. I guess that is just my stance on 3D in general, not the movie. I just don't see that it adds anything of value to the film.
TLDR: Beauty is only skin deep with this movie. Great cinematography and effects, but a very thin story with little suspense and practically no character development.
EDIT: deleted what I guess someone may consider a minor spoiler