Looked good in a beggining (except i chose an it specialist class and i wasnt able to kill more than one zombie at the time before i reached level 2 and pumped my skillpoints into melee), but it ended up with looking for 8+ sword instead of 7+. Those 30 (or more) zombie waves out of nowhere after first half of the game, become more of a piss-off than horror element (if you don't have combat powerbuild, you most likely die in many of them no matter what) and game becomes more of a clickfest than survival horror. Also more than half of the storyline sufferes from the "too late" syndrome (by the time you move where your wife is supposed to be, she's not there anymore)
Quests were mostly go there find this and that, go back, and except 3 or 4 they weren't voluntary. As for the "barter" system, I wasn't able to figure out how to sell my stuff (unless there is a way to sell my stuff i wouldn't there to call it barter), and apart from medkits which i needed to use for some achievement i never found anything valuable in the shop.
Nevertheless the scarcity of food in survivor mode forcing you to explore almost everything was quite a good thing.
I'd say the first 2 games were better than this (though they were barricade shooters).
Hero: "Honey, did you say you were bitten?"
Wife: "At the hospital, yeah."
*boom headshost* (at least that's what I wanted to do, if the game would let me)