Zom-B

I'm getting ready to read Rise of the Governor, and I'm thinking about buying this series to go to after that. It's gotten a few good reviews, but I'm still uneasy about it. It's going to be a big series, with a new title coming out every couple months, the first 2 are out now, and only about $12 each for Hardcovers. Has anybody read either Zom-B or Zom-B:Underground I believe it is? If so, what do you think?