I've purchased a couple of the warbirds DVD's from Zenos. Once, I thought there was a glitch in one of the DVD's, and e-mailed him to that effect. However, the next day when I watched it, it worked fine. I e-mailed him to tell him that it was ok, and he said that he'd already sent a replacement DVD. Talk about fast service! The new DVD arrived a day or so later, but since mine was working ok, I returned it to him.
I plan to buy some more of the wwII aircraft series from him, but right now $$$ is the only thing slowing me down.
Excellent and fast customer service!!!