I'm generally a fan of Zombie stories and I'm not riding the "I'm so sick of Zombies!"-bandwagon yet. Most Zombie movies are very cheaply made C-Movie trash, so I really appreciate a Zombie movie with high production values and a capable cast with a well known lead. The fact that it caught me off guard and I didn't even know it was a Zombie movie made it even better. From the plot summary I expected the threat to be a more conventional disease, or a alien monster, or some incorporeal force (like in "Sphere") or alien technology, or a crazy crew member. As a Zombie connoisseur I also appreciate that they managed to create a new, intelligent and fast kind of Zombie that is still as creepy and single minded as the classical Romero type. Many other reviewers here criticized the movie as being derivative, but I don't see it. The only other "Space Zombie" movie I know of is "Life Force" and it has pretty much nothing in common with that one. It would have been derivative if the threat would have been one of the other options I listed above. Like I said, I'm not sick of Zombies yet, but I can understand people who are, so I understand how another Zombie movie could put people off, especially one like this that doesn't advertise itself as a Zombie movie and comes out of the left field, but this one is such a rarity with its high production value, the good cast, good acting, suspense, drama and a A List (I think) lead actor who doesn't seem unhappy about being in the movie, as Brad Pit does in "World War Z".
Review of The Last Days on Mars
