iTunes has the pilot of Z Nation and lots of other shows available for free. I almost bought the iTunes season pass on the spot because I've always liked zombies in everything from movies, to video games, to books. I'm glad I chose to just watch the free pilot instead of pulling the trigger on the season pass.
The show just didn't do it for me. I guess I prefer the more serious tone of The Walking Dead to silly zombie babies. Plus they killed off the only actor I actually liked in the first episode. This show is made by The Asylum, the people responsible for all the cheap knockoffs of popular movies that try to trick people into picking them up by mistake at the store. From what I saw in the pilot it looks like they are just bringing their brand of cheap knockoffs to TV.
I hope it got better after the first episode. From most people's reaction here it seems like it might have. If the season gets glowing reviews I'll check it out when it comes to Netflix or Amazon Prime but it's not worth the $25 Apple wants for a season pass.