I especially liked how they eliminated virtually all of the contrived emotional nonsense that usually fills films of this ilk - no wasted scenes of distraught family members back on Earth for this flick.
I also liked that I didn't have to spend half the movie rolling my eyes at clearly absurd situations, and although I haven't seen any REAL astronauts debunking of this yet [ala Gravity], it all seemed quite plausible to me [apart from one innocuous scene at the end].