I really liked this movie and I think the low reviews are from people who were expecting the expected and didn't get that. I love when a movie surprises you and doesn't give you what you are expecting from it. The entire time I watched this movie I couldn't help but think about what I would do in this situation, how would I survive in this penthouse with little water and your food source running out. (I noticed he never ate the fish in the fish tanks.) This movie made me think more and more about technology and how far we have come and how much it limits us when basic survival is all we need.