I grabbed this when you posted and then read the novella and the two follow ups. I really enjoyed them. They had a nice authentic feel to them (as well as zombie books can!) and even though a few people complain about the 'super zeds' and the laser weapon I don't think they ruined the story at all.
Worth a look on Kindle.
It's got me thinking zombies now so I should really be cursing you!
Andy