It's... okay. My main criticism is about how the guns are nonsensically designed and totally unbalanced. It's probably the best in the beginning, doing jobs for conspiratard militiamen and ex-cop slavers (both being "good guys"), but not worth playing entirely as I did. Play it until you feel it's repeating itself too much, and it does a lot like in most open world games. At some point you've seen about everything the game has to offer, minus just some new monsters who are nothing spectacular. Or until you figure out the zombies and they stop being scary, just tedious in large groups and a nuisance otherwise. I guess that's first several hours.