Pros:

+Clever map design.

Cons:

-First map way too long.
-Second map poorly designed.

Conclusion:

Specifications on the cons: the first map was way too long, that speaks for itself. My friend and I who both played it could not outlast the first chapter three times over due to lack of sufficient health supplies for such a lengthy chapter. The second map is where my friend and I gave up because we were all standing in the water when the draw doors were opened and electrocuted the water... Incapacitating ALL OF US with NO WARNING. Otherwise the map designs were all very nice and if the gameplay was tweaked this campaign would be much better.

Pros:

-Expansive environment, easy to get side-tracked (provides lots of opportunity to explore).
-All maps are well laid out.
-Events are challenging and fun, not too few and not too many. All very well laid out.
-Several good areas to death charge.

Cons:

-Easy to get lost.
-Texturing can be dull sometimes.
-Finale too spread out, it should be more compact.
-Tank AI has the tendency to suicide during the finale.

Conclusion:

This campaign is exceedingly fun and clever. I enjoyed exploring the many extra rooms and corridors that served no purpose but were there for realism. There are about as many pros as there are cons, but the campaign is still fun and still worth downloading. The only legitimate complaint I have is in regards to the finale. It's not your typical rescue event, so maybe I'm simply not used to it. But in order to complete it you have to pop around the whole finale map. It was still fun, but not my favorite finale.

Not a regretful download, very fun. Good use of your time.