i have heard opinions on anywhere from 60%-70%. For me, about 65 is right. As long as your cigars don't get mold, its personal preferance. But at 72%, I think you are flirting with disastor. In my 5 or 6 years of reading cigar boards, I dont remember anyone saying they kept their cigars at 72%. It was strange to me that a company could put all this $ into developing an expensive product, yet be so far off of what every cigar smoker feels is the correct humidity level. They are nice guys to talk too, but I just dont think the product will sell.