Pros:

Very Epic map
love the LOTR music
very challenging map
NPC like Gimli and Gandalf
nice storyline
Challenging
L4D1 survivors

Cons:

Flow is broken it say when i use sb_takecontrol
Bot don't fall back sometimes
I suggest for one more heavy machine gun in the keep
The door is too fragile(for me)
Very hard without human players exist

Conclusion:

This is the best survival map that I ever play. Everything was good except those idiotic bot. Nice Job!