Pros:

It's a tutorial

Traps

Tricks

Cons:

You forgot shoving

You forgot ammo upgrades

You forgot throwable items

You forgot gas cans, oxygen tanks, and propane tanks

You forgot crescendo events

Conclusion:

Needs more tutorials.

Pros:

+ It has got to be the most challenging map to newer players and some players  

+ Extreme weather

+ The L4D 1 survivors! 

+ Much more like a disaster movie to me

+ Puts your speed running skills to the max

+ Epic soundtrack

Cons:

- Hard to play with bots

- The ending was disappointing
 
- Sometimes, it may be too bright or too dark

Conclusion:

THE GREATEST MAP EVER!

Pros:

Challenging because of the insufficient ammo.

No rolling crescendos.

Tank ambushes.

Cons:

WHERE THE HELL IS THE HELICOPTER?!

No tier 2 weapons in any safe room.

Confusing directions, especially map 4.

Conclusion:

Great map! But please make a survival level.