Just played this in Easy Mode, with the recent update of Left 4 Dead 2 and they're where no issues noticed, until the last Chapter, the atmosphere of the game is just so good, no super dark night area, it's all balanced, good thing I installed the smart bots, cause there were so many resources that it's super useful, like grenades, heals, etc. the ammo loot is quite challenging makes you conserve more ammo, to not super use it, and super glad I'm using melee. Got kinda stuck on the building part but got away. And the slight issue in the last Chapter is when I enter the train, the bots where having a hard time to enter that almost restarted the map (due to tank almost killing me). But anyways it's so good no more to say.
So Good!
This review was posted before the latest release.