Good start if a little cliche, but I quickly lost interest in the main characters. By about 3/4 of the way through I was actively cheering for the bad guys, even knowing how things were going to wind up. The only question was which one of the secondary characters was going to get the worst of it to generate some emotion from the reader.
Bottom line is if you enjoyed it, great, wasn't for me though.
Wanted to like this more might be the best title for my review. I normally enjoy this type of story but it just didn't grab me as I expected it to. I enjoyed the pacing toward the last third of the book, the story switched lines in such a way that it kept the excitement growing until the end. I still would recommend it for sci-if fans.