I've been running the vampire gear in my cars for well over 18 months now. I cant fault the quality at all. In fact its the best stuff I've ever used. The speedo and motors are very smooth, even on full timing boost. The set up is simple and intuitive. The batteries speak for themselves, and the prices are great compared with other quality named brands. I've used quite a few of the other brands over the years and I'm very happy with Vampire.
I'm sure if you had any problems you could speak with Darren at DMS racing and he would get it sorted for you.
Hopefully the website will return soon.