There's non-stop action throughout the entire book, but sadly it's the same action in every chapter, often using the same few words, phrases and descriptions. Which is baffling because a zombie outbreak on a space station should allow for some interesting situations.
Another big flaw is that you never really feel connected to anyone on the team outside of maybe one or two of them. When they die, there is no impact at all in their loss. There are a few other flaws with the soldier characters, but I'm going to leave that alone here.
Because of the repetitive nature of the story, I was ready for it to be over by the half-way mark if not before, and leaves me not wanting to read further into the series which is a bummer because I love sci-fi and zombies. Gave it a 3, but honestly it's more a 2.5.