Pros:

- Real zombie feeling.
- More tactical gameplay (should I shoot this basterd, or run past him)
- No emergency gun, just an simple knife.

Cons:

- Finals take way to long
- Zombies are a bit too strong.

Conclusion:

It's an awesome mod which gives you the feeling of an real appocalypse. Tactical gameplay is required, or you won't survive. Try to keep the shooting to a minimum, keep your bullets for a horde, I like that kind of play.

Of the cons I've noted, there's only one which really annoys me: The very long finals. Maybe (if posible) you should reduce the zombies in the final hordes, or reduce the amount of waves. But overall it's a great mod.