My overall enjoyment of the movie was pretty decent, its nothing something I'd watch numerous times, but it was alright for a one time view.
The acting was pretty good, as were the sets, makeup etc. They also captured the tension in making on the go/tough decisions quite well.
The downside, for me personally to the movie, was that it quickly turned into a 'zombieish' kind of movie: Infected trying to infect non-infected, non-infected trying to survive. Now I like the occasional zombie movie, but I've only read the brief description on IMDb before watching,and I personally expected something different, something a bit more original. There was no real 'reason' the whole movie is based on Mars. You could replace Mars with an island, the infected with zombies, the bacteria with, well, a bacteria and the rescue pod with a rescue ship for example, and basically have the same movie.
All in all, if you're like me, and enjoy watching some low budget sci-fi, this is a movie I'd give a try.