I just myself seen it and I felt they took out some of the science to make it more watchable. If you read the book you know it was way more intricate.
http://www.gamegents.com/2015/12/03/dlr-the-martian/ - This actually explain exactly how I feel.
http://www.gamegents.com/2015/12/03/dlr-the-martian/ - This actually explain exactly how I feel.