Pros:

-Every weapon available
-Supports more then one gamemode
-Wonderful gameplay experience
-Working bots
-Easily recognizable surroundings
-GLaDOs' voice

Cons:

-Players can easily get surrounded (Not good for survival)

Conclusion:

All in all a wonderful map. for all the hard work put into this, you are getting a big rating of 99 from me!
Even GLaDOs would be impressed.