Pros:

GREAT detail
Very large map to explore
Top notch level design and concept
One of the best survival maps out there.

Cons:

Co-op is just one map.
AI Can stumble a bit on the rooftops.

Conclusion:

Very impressive single map! This definitely rivals any of the Valve maps that are in the game!

This is currently my favourite community made survival map.

Campaign is too short however. Make a 3 or 4 map campaign of the same quality as this one map and you'll have yourself just about the best campaign out there!

Pros:

Blood Harvest in L4D2!
Faithful port of the original map
Very professionally ported
No major issues (or many minor issues either)
Runs well, no issues with optimisation at all

Cons:

Lighting for the campaign seems a little too bright.
Had difficulty finding the helicopter in the finale, a hint box would be helpful.

Conclusion:

My god, I am getting tired of coming up with new ways to talk about how awesome these Heartless made maps are.

Simply put, this is an AWESOME addition to the custom maps community.

Thank you Heartless! You rock the mic mate!

Pros:

Very faithful port of the original
Fun!
Very professionally reproduced
Fun!
The whole campaign feels nearly like the original
Fun!

Cons:

Cannot start the finale in Versus
Not crazy about the placement of the fixed machine gun in the finale.

Conclusion:

I must stress that the Cons (Albeit a major one in not being able to start the finale) are pretty much outshone by the excellence of this port. Yes, there are still lingering issues (that I am sure will be worked out) but taken as a whole this map is stellar. When the issues are fully worked out I would rate this a 98.

A marvellous port of the original Campaign! Thank you Heartless, you are a rock star mate!