Thought it was interesting to bring in the zombie concept but not really have a whole lot of... zombie action until the end? But the war aspect of the movie was exciting enough for it to not matter. The ending few scenes definitely made up for it and I think it was a good balance of the war/zombie genres. They made the nazi zombies trope feel not so cheesy which isn't an easy task most of the time.
Thought it was funny that they were sneaking around the whole time until the zombies came out and then suddenly they were just SPRINTING through the army base with no cares in the world. Loved the concept of being in a nazi base and the last of your worries is running into an actual nazi.
Agreed that the effects were fun. Only complaint there was that they weren't really.. consistent? The Chase scene specifically just felt like they were doing effects just to show off with his head sliding back and what not.
BUT LIKED IT. And thought the characters fleshed out really well.