I downloaded season 1 and 2, but never watched them yet.
I completely agree. I believe it's the most realistic example of a horrible epidemic.Watch it, its great. I think its been the complete rebirth of Zombie games and movies, e.g DayZ.
I like how its your perfect realistic zombie survival show that isn't afraid to show blood and follows the original concept of a zombie nicely (deteriorated bones, unable to run, climb etc..)
As long as they don't get carried away and try to make a movie then i think its going to be a continual success.