Pros:

+Running from ground-shaking tanks in coop is fun.
+Knocking friends off the cliff in versus is more fun.
+Having an "end" in stage-based survival is truly creative and makes players have a purpose to go on(fastest time to finish maybe?).

Cons:

-After halftime in taank mutation, items are all gone, only laser exist, bug?
-Tanks still have 6000 hp instead of 1500 in versus, bug?
-Water still in purple chess (highest graphic setting)

Conclusion:

One maps, two layouts, three kinds of fun, reminding me of Valve. Extremely high replay value. If you can fix the versus bugs, this map will rock.