The game has some fun in it, but overall it is a disappointment.
1. First and foremost, it is not finished. Bugs and random CTD all the times.
2. The interaction with other survivors is, as RPS indicated, quite silly. Not much of a RPG there.
3. Zombies stand there and wait to be killed. Just walk, or even run, to them and club them in the head. Rinse and repeat… forever…. Sooo boring.
4. Battles with humans are better, until you learn that the AI is brain dead and you can just exploit the environment (or the pause function) to kill anybody from the very beginning.
5. The story is cliche and unimaginative.
6. The only good part is the sandbox in which you struggle to find resources.
7. So many design limitations are just infuriating: Why can I leave the map just from a specified area? Why I must be in that area to check the time? Why everybody is standing still? Why can I enter building only through doors? I have explosive and such, and I see windows everywhere… What is going on with the second floor in this game? Why everybody must go to bed at 8?….
In summary, yes, it can be fun, but the sad reality is that it deserves the lackluster reception it had (already out of the Steam top list) because it is a mediocre, low budget game.