Very polished, good length.
Love the new voice lines, and the custom music was a nice touch.
Fun overall.
Cons:
Pretty freaking tough, even on just normal.
A couple of glitches- forklift in part 4 pushed a bot through the floor, and there were a couple of pathing problems for infected and survivors alike.
Individual maps a bit on the too-long side.
Pros:
Cons:
Conclusion:
This review was posted before the latest release.