The Martian is a great Space-Fi adventure flick. Very well done with some very good actors. The science is OK, and by that I mean not terrible. It only gets really hokey and unbelievable at the very end. Having worked as an engineer in the aerospace industry for a few decades, this is where sci-fi movies usually fall apart for me. This one is worth seeing for the story line and production values. The less you know the more you'll like it, but knowing how things work won't entirely keep you from enjoying it.