Pros:
-- Levels are just the right blend of realism and fantasy: they're detailed, but also open and full of great angles to hold, corridors to run through guns blazing, and arenas for panic events and tanks. -- Tons of alternate, non-randomized paths. -- Plenty of locations where verticality plays a major role, esp. during panic events. -- A couple of nice twists on oft-used events like cranes and slowly-rising doors. -- Finale is quite intense (four randomly spawned tanks!), but it also presents quite a few opportunities to position yourself so well that you feel untouchable. There's some excellent sniping spots near the bridge.
Cons:
-- It's perhaps possible to make initial survival portion of the finale too easy by camping out in the right spot. I think this is balanced out by other factors, though.
Conclusion:
A really fun campaign that's given me several hours of enjoyment, and is added to my list of campaigns to play with friends when I can rope them into it. I can see why it's remained popular.
Pros:
Cons:
Conclusion: