Actually, I'm a fan of zombie games, but this is simply too boring. The missions are hardly varied, the levels are very linear, there is little to be discovered and if you have time killed all the zombies and look for the mission objective, you realize very quickly how small and "lifeless" the environment is.
The Safe House is a very nice idea as a storage stand-replacement, but it does not identify with his character, because you end up back as a different character in the Safe House after the death.
The idea is nice, implementation mediocre - let's see if I play it further or not.