Pros:

-the long corridor with water(before the big hall with radio)
-the underwater is ok but not perfect(see conclusion)
-radio as start... XD
-good map for pros n stuff :D

Cons:

-bots are stupid.
-zombies attack from the spawnroom/saferoom??
-dont play it with BOTS or with NOOBS

Conclusion:

-i like the long hall, easy to kill everything with pistols...tank:4 players with m4 :D
-noobs just die at the ladder
-bots do same,or they jump in water(dont ask me why)
-underwater: well you dont see much its like green in blue in gray stuff so just make more sight range that would be awesome
-90/100 cause of great map, good spots, underwater and -10 because of little :/
-just 5 rooms: spawnpoint,the long corridor, the great hall, the bed+bath room and the underwater room upstairs and downstairs

Pros:

-low gravity
-some easter eggs
-the flowers from mario :D
-mario&luigi(would be much better if they were alive but still cool)
-I LOVE THE "?" because they drop items :D
-the escape
-versus mode(so many ways to kill someone fast)

Cons:

-bots=STUPID AS HELL
-NO MUSIC :(

Conclusion:

One of the best add ons i ever played. but really needs music
I saw its just a beta..if the full version is better you get 100 points 
DONT FORGET THE MUSIC
and do some endboss like....tank looks like browser or stuff