Pros:

-New melee weapons.
-No bugs or glitches.

Cons:

-Random dialogues that made literally no sense.
-Hints on what to do would have been really nice.
-On the third stage, after the tractor is moved, the zombies do not stop respawning instantly. I actually ended the third stage with 1,162 common infected kills.
-The doors that required a key did not actually require a key. You could break through them with a melee weapon.
-The bots are entirely useless, making it close to impossible to play on your own.
-There was a lack of hero closets and defibrillators, which should have been abundant because of the lengths of the maps.

Conclusion:

This was unique at first, but then I started to realize: This campaign makes no sense. It says it's supposed to be challenging--I think silly is a more proper word. I really expected a much better experience from this campaign. I know it's beta, but that doesn't change how the content of the campaign was just not enjoyable, even with friends. This is one of those maps you'll play once and never come back to again.