Pros:

good idea
beta very accurate

Cons:

missing the sound of the train
too short
if you play with bots every time someone dies just trying to jump from one car to another

Conclusion:

is not made to play in co-op, since the map forces comparatively to proceed in single file. not I would see as a final map, but within a campaign. ultimately the idea is good, I enjoyed it ..... but it is a little too simple and this makes the map a great way for warmth waiting some hardest challenges.

if it does not change anything I think might be the top for the last man on heart mutation