Pros:

- well designed levels
- Yeti tank!
- challanged parts
- long levels
- much zombies
- good obstacles

Cons:

- I realy enjoyed playing this map i like the Yeti-tank skin
and the level designs.

- i saw a view glitches like in the elevator
(no big deal you was enable to jump off the level)
much zombies

- Yeti-tank skin you can see in like the hard rain campaign.

Conclusion:

I must say well done! i rate this map an 87 out of 100.
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If you don't want Yeti-tank  in other campaigns just do this:
(main menu -> extras -> freezer burn -> disselect it)
when disabled you have normal tank skin back but you can't join this campaign.
just enable the campaign to play again (takes only 4 seconds) :0