I watched it night before last via On Demand and thought it was great except for a couple of things.
First, how are you going to wake up in zombie world and not start asking about a million questions? I mean, you're not even curious a LITTLE how it all started? I get that the dude is not talkative but come on bro, get some backstory.
Second, I hate to get on a high horse, no pun intended, but did they really have to make the wife such a callow b*tch? First, you cruise out of town with your kid but don't even stop by the hospital to pick up your injured husband, and worse you start banging his best friend after what, 2 weeks? Wow, don't let any moss grow on that thing lady.
It sort of turns the whole thing into an absurd farce, like some twisted play on the Odyssey, where the husband defies all manner of obstacles to reunite with his "loyal wife" only to find she started nailing his best friend 5 minutes after he was out of the picture.

Not exactly epic.
About now I am just hoping she and her dumbass lover get ripped apart and eaten, leaving the kid and hid Dad to ride off into the sunset.
More zombies, less love triangle...
Will have to work hard to top the ending of Dead Set.