I've got a couple of Zombie Tools blades that I chop at seasoned oak with, a Vakra and Traumahawk. They are good blades and stand up to the abuse I put them through just as well as my higher dollar choppers. My first Traumahawk's blade bent a little bit (it happens, even with Busses sometimes) and they replaced it, no problem, even refunded my shipping cost.
IMO they are good blades and the Zombie Tools crew is great to deal with. They stand behind their work, I had one of their very, very early models, sent it in for a sheath and a wrap and they offered to replace it for free because they felt their workmanship had grown much better since producing it.
Only thing I'd change is the sheath on the Vakra, it rattles around in there a little, I think an exposed spine sheath would be better.
I had been heavy into "the whole zombie thing" since the Night of the Living Dead remake in the 90's, but it's been played out a little too much and I'm pretty much over it now. One thing I'll never be "over", though, is good steel.