Pros:

-Great Gameplay
-very creative
-amazing scripting
-loved the lazer gnome
-Vehicle upgrades
-custom vehicles (no duh)
-playable music

Cons:

-buying a maintenance truck first starts generating points without alerting the horde.
-bots tend to run into the fully upgraded police car's blade and die without any hope of revival.
-no amo piles (might be a pro if your looking for a bigger challenge)
-Hireable survivors glitching into the killdozer
-found myself outside the map alot with no way to get back

Conclusion:

Overall i loved it, however buying the maintenance truck allows you to generate points without alerting the horde so that made it way to easy to max out everything before i started with the train. and a couple of times Bill and Francis warped to the killdozer along with Luis, maybe it was just a glitch. other than a couple of other problems i loved it.