I could only watch an hour of it, but got it recorded and plan on watching the whole thing tomorrow.
the History Channel has definitly increased the number of survival/end of civilization/no people/SHTF programs lately, most are good for entertainment. I feel this one was done well (what I saw of it).
if you like that kind of stuff watch real, quality material available for free on youtube without being poisoned by any annoying commercials. there are a ton of info wars documentaries that are very interesting/important that you should watch such as:
[ame="http://www.youtube.com/watch?v=jf0khstYDLA"]what in the world are they sparying?[/ame]
[ame="http://www.youtube.com/watch?v=x-CrNlilZho&feature=relmfu"]endgame[/ame]
there are a ton of good ones. i feel like all the trash on history and discovery nowadays is worthless stuff that keeps stringing you along from commercial to commercial leading you on so that you'll sit and watch the whole thing.