Pros:

Great map layout.  Easy to deal with hordes if you keep an eye out.

Constant awareness is a must on expert.  Not for your average player.

Cons:

Most panic events were a switch with a slow door or gate.  Gets boring after a few.

Horde and special spawns in the middle of a tank fight.

Finale subway boarding is very difficult on expert.

Conclusion:

One of the better maps I've played.   If you want constant killing an mayham, this is it.