Pros:

+Very original
+Very fun, completely crazy and hard to figure out
+I just played with friends and haven't laughed so hard in quite some time.
+the area where everything is turned on its side is just brilliant. 

Cons:

-numerous texture issues. Some of these improved after verifying cache, but some continued. All of us had to do something tho make it work right.

Conclusion:

I haven't had so much fun in quite some time. There are more polished campaigns around, but for some sheer crazy fun, this was awesome.