Pros:

Interesting graffiti
Novel setting
Gorgeous attention to detail
Interesting twists on maps
Miniguns set up for actual use (yay!)
Most memorable finale ever
Nasty surprise at very start (where's my SMG?)

Cons:

Surprisingly easy once you get Tier 1 weapons (but we _were_ playing on Easy)

Conclusion:

Of the several custom campaigns I've downloaded, I like this one best. Outstanding work.