The beginning was pretty slow and the shots were artistic, I thought I had the wrong movie based on the trailer. Then everything goes into hyper drive about half way into the movie. The ending was intense and I found myself rooting for the characters, heart pounding. Doesn't usually happen. I'm into scifi, action, and guns, and I felt the movie was pretty realistic. Definitely enjoyable and a nice change of pace since I've seen almost every other scifi. I liked it. Would probably give the film a 5 or 6, but 7 for surprising me.