If you have read the book you will be very disappointed.

Rating: 3/10 (5 March 2016)

This is my very first review ever on IMDb.com and the reason I wanted to write here is because, I have never been this disappointed in a movie in my life.
Yes I have read the book, and it kept me up many late nights. I would rate the book 9/10 in my opinion if you like this genre. The book is so large that the movie format didn't work well at all with this book. Should have been done in a maybe 5 hour miniseries instead.
The big problem with trying to scale down a 12-13 hour book is trying to fit in the most important parts. And they did get the important parts in the movie but, the thing is, on almost every page in the book the main character almost dies. He always has a problem to fix, and if he doesn't fix it in time he either suffocates gets dehydrated or starves to death. And when reading the book you really get a feel for how dire the situation really is on mars with the supplies he has to work with. The movie jumps so often that you don't get that feeling.
My conclusion is that if you have read the book stay the hell away from this movie, it will not be worth your time.