The movie was terrible compared to the book

Rating: 3/10 (9 November 2015)

Let me start out by saying that I loved the book. It is one of my favorites of all time and I highly recommend it. That being said, this movie was the worst adaptation of a book I have ever seen. (just behind Eragon) The movie itself is very well done, with great acting and special effects. I just hated how much it wasn't like the book. I know you're not supposed to compare books to movies, but man. This was just awful.
Mark Watney in the book is a hilarious character and very well thought out. The movie made him seem like a typical guy who occasionally cracks a joke. In the book, I was laughing almost every page because of how funny the guy is. That is one problem with the movie. It wasn't funny enough. The book was basically a comedy. You could market it that way and nobody would bat an eye. You couldn't really do that with the movie.
:SPOILERS IN MOVIE AND BOOK: One of the things that I really hated was the ending. I realize they gotta make it dramatic and all that, but man! Way overdone! In the book, it is Beck who saves Watney, not captain Lewis. I just thought, why? Why the heck did Lewis go in the movie? Beck was specially trained in that field. That was his thing. That is what he was trained for. That's like having the captain doing surgery even though she wasn't really trained for it. (kinda extreme, but i think it gets the point across) Also, Watney didn't do that dumb iron man thing. I'm sorry, but that was just stupid. I mentions it in the book, but he didn't do it.
So all in all, the movie was crap, but the book was amazing. I recommend you skip the movie, and just buy the book instead. Much better usage of your money.