Glad I use only one source for over the past 15 years, and that's our hosts here at FOH. Also, for me, whenever I get new boxes delivered, they go straight to my humidor for a few months, then I vacuum seal them and forget about them for many years. I'll usually open them up, take a quick look at them, take a deep whiff, then off to a long sleep they go. If there was a problem with how they taste, I wouldn't realize it until a long time down the road.