Pros:

+ TF2
+ Just like the original
+ Can go into the Red spawn
+ Couldn't find any bugs and zombies ran around the map fine
+ Very good weapon placements
+ Survival is fun

Cons:

- In the Red spawn area, you can shoot through the glass and zombies can't hit you through it. (Balance issues mainly, not going to deduct points)

Conclusion:

I haven't played it on Co-op yet but Survival is flawless on this map. Very well done!