Very Good. I really like the way that has three separate time zones. Immediately during / post outbereak, a few years after and then many years later, with slightly different rules for each.
You would therefore be able to play the entire timeline of WW-Z (the book) or Walking Dead Franchies as easily as Black Summer / Train to Busan. This is a hige convenience and lets you plan long term campaigns or plotlines for your little group of survivors.
The character generation is straightforad and easy to follow while the game mechanics are simple enough to not get in the way of fluid play while still givng the players a feeling that things are not 100% GM driven.
[5 of 5 Stars!]