Don't get me wrong, I liked the movie, but the plot required a ton of things going right and no single life-snuffing thing going wrong, and midway through the movie it started to bother me. Yes, there was a major thing that went wrong (foreshadowed of course by some nitwit at mission control observing that things were going well ) which nearly killed him. And of course the major major thing at the beginning, coupled with the minor major thing that saved his life. But I'm talking about the day to day things that go wrong. A door gets stuck and then when you forget and force it it's off its tracks, and you can't open it. Something falls over that requires two people to set it right. The Mars Rover gets a flat tire or breaks an axle - for that matter, is the Rover so maintenance free that a botanist can keep it in running order? Movies require suspension of disbelief and somewhere along the line they lost me in that regard. Getting him home safely required a sequence of correctly executed maneuvers that made Gravity look like a simple parachute ride down for Sandra Bullock. Nonetheless, as I said, I liked the movie overall. My wife was a biology major in college before switching to math, and when we go for walks she's always commenting on the flora along the way - and after this movie I was able to say the next day "you're botanying the sh*t out of this, aren't you?". Also, as a novice trail builder in mountain/desert terrain, I couldn't help thinking about my more experienced friends' reactions to seeing the challenging terrain in the movie. "Wow, you could put a great trail right there, and another one there, and there...". I guess I'm saying, they REALLY succeeded in making me feel I was there.