At least for me the best way to play is with friends and it's hilarious and fun, there are many options to create a world to your liking and difficulty.
The game has lots of little details which makes the game more realistic but sometimes tiresome when you have to take all your clothes off because the character sweats too much.
The problem i face everytime is when you get enough weapons, food and shelter there is basically not much to do, and usually the only thing left is die fighting the most amount of zombies possible.
And the amount of guns and objects in general its not very wide, and of course im talking without mods but the fact that the mods are actually are supported is great.