Pros:

- different
- good bot nav
- not completely linear
- nice urban setting, quite realistic compared to other campaigns
- many cars to climb^^

Cons:

- first map was a bit open, wide streets with some cars but only few buildings to explore or burricade in
- ran in circles a few times
- finale too easy

Conclusion:

This is a nice campaign - with some flaws but also lots of potential for further improvement.

You should add a few more arrows in map 2 and 3 so people dont get lost so easily. If you want them to see all the places you recreated maybe you should move some barricades and change the route to include these areas, make the maps more linear again. 

Most areas look a bit to clean. Car wrecks or not, there should be more damage.  
The final needs a lot more zombies. Even with three stupid bots and two big tanks on that small roof it was a piece of cake.

Maybe you could let the helicopter veer away (hope this is the right term) when a tank enters the rooftop ... the tennis court would be nice place to land... and maybe the other survivers are already onboard and help you fight off the hords at the pool... just a thought. 

I would've rated this campaign a solid 8, but after "theshwag"s unfair rating ...