After watching the first season, I've now ordered the second. They are reasonably priced at $10 for Season 1 and $20 for Season 2 (in Canadian funds). The third season is currently airing on television, and the series has been renewed for a fourth season
Why do I enjoy Z Nation? It has an entertaining and irascible collection of characters, as well as interesting story lines. It also doesn't mind poking fun at itself with its sometimes campy dialogue. And the zombies are much faster-moving than the lumbering walkers of The Walking Dead, which makes them even more dangerous.
Now that The Walking Dead has wrapped up its mid-season finale, you might like to check out this series.
I think you'll enjoy it!