I watched it. It needs polish, but if it goes the way I think it will, into gratuitous zombie killing with style, and so forth, it'll probably do well. Still, I hate runners, though.
I think "needs polish" is a being very, very kind. The show falls short in every respect, but most damningly in the writing and acting departments (which is painfully bad throughout). Characters are flat and archetypal, and they behave neither believably nor consistently, more than once contradicting themselves or changing roles from one scene to the next. "Twists" in the plot are telegraphed, and it is extremely clear that the zombies only appear when they are needed to conveniently drive the plot, and when the budget allows. Need two newly-introduced characters to abandon their community and travel with the central characters? Have their commune attacked off-screen while they're away. Need to kill a character? Have them turn their back on a corpse they've assured the audience is "dead," only to have it suddenly attack. This happens twice in the episode, undermining the presentation of these characters as battle-hardened survivors and zombie-slaying badasses, and highlighting the lousy writing.
Don't expect zombies in the number or quality of The Walking Dead, and don't expect to see them in the background of shots unless they are currently "threatening" the characters. They otherwise feel to be absent, even in scenes of overrun towns. (I'm having a hard time putting words to it... they just seem to be non-entities, and not because they're the living dead.) Less important, but still notable, is the poor CGI. I've watched C and D movies that looked, sounded, and all-around were better.
I contest Mr Lemon's review. He claims that the show isn't about about drama, yet characters arguing with each other makes up the majority of their interaction. If that isn't the focus, I fail to see what it IS about, because it hardly seems to be about the zombies. The premier doesn't give us an outpost being overrun, it gives us exposition as the action occurs off screen. It does give us an airplane that falls from the sky, in the distance of one scene, but with no repercussions or true impact on the plot, just some poor CGI to reinforce the chaos of the world and the isolation of a particular character.
Sharknado was so bad, but so stupid, I could watch and laugh my way through most of it. Z Nation is just bad, just stupid. Nothing you will see is memorable, nothing you will see is worth it; you will never get that time back. We aren't so starved for Zombies that we need to settle for such drivel, and certainly not so starved that someone in the business of reviewing such work should recommend it. If you want some sci-fi horror on TV right now, Penny Dreadful, The Strain, or The Leftovers are all flawed, but much, much better options. They don't have zombies, but they do have acting, writing, and better production value.