Pros:

*Creative, that's for sure. The puzzle kept me and my two friends busy for 20 minutes cause we were needing health packs.
*The witches were a nice 'lol' effect. We killed 3 and let the other two run off. Killed AI Zoey.

Cons:

*While I did like the puzzle, at the same time it was a major headache.
*Near the finale, the big building was a bit too spacious with a bunch of doors. We constantly kept getting lost.

Conclusion:

Overall, pretty unique, and well thought out. The puzzle was definitely something innovative.

Pros:

*Very much like Portal, which I liked.
*Puzzles were nicely laid out.
*Nice reward at the end of puzzle, usually, with ammo, health kits/pills, and items.

Cons:

*Repetitive.
*A little too short.
*Finales were horrendous. But somehow a bot made it, while the other bot and my friend and I died.
*Random tank and witch spawns.
*Bot fails with going across the bridge..killed us all.

Conclusion:

A very nice campaign much like Portal. Aside from the slight repetitiveness, it was a nice layout. I liked how you had to blow some stuff to finish some puzzles too. We had fun with the spawning propane tanks. :p