One of the greatest movie I watch in 2015. The story was unique and very good. Direction was good but one thing in the movie there is no year mention mean it can be any time in future but the tech may not be same which shows in this movie at that time.
One thing also is the main character who stuck on mars maybe was not that much worry that he left alone on the mars I think more emotion can be include. But still it was one of the best movie in 2015