Pros:

-Well Detailed and Designed
-I like how they spawn from uphill
-The Chairlift is hilarious and fun
-Good weapons placement, ammo
-Pretty bug free, we couldn't find glitches, except...

Cons:

-Lack of quality hold out positions, maybe add a few ladders?
-You can stop chair on chairlift by wedging between pole and chair (but not the whole lift)

Conclusion:

We had a lot of fun playing this map, the best is 2's on chairs,  but it's great how the hoards and tanks follow you up and downhill.  It seems at first the chairlift is the way to go, but it really isn't.  All the special do damage on the chairlift (except chargers, unless at the turn).  

Either way well made and a fun map!  We played for a good hour or so, 12 min was our max defending at upper lodge.