I try to keep my box between %65-%70 RH all the time. I live on an island where humidity can get quite high. So I often get burn issues when I store my gar's at %70 or higher. Over in England, they keep their cigars between %60-%65 for years with no adverse side effects.
I think what it comes down to is this, the cigar you have vs. the time the cigars have been at that RH. Some wrappers burn slower than others, some cigars are rolled tighter than others, and some cigars are shipped wetter than others. Do an experiment. Take 2 tupperwares, keep one at %65 and the other at above %70. Throw in 4 sticks of you favorite cigar into each. Let em sit for like a month or so, the smoke one of each. Take notes on the taste and burn characteristics of both. Bet after you smoke all of them you will notice a difference in trends between the 2. Maybe I am anal about this, but I bet I am not the only one.
Finally, I bet that if Vern is willing to but his reputation behind his product, then his product is worth it. Just my 2 cents.
Emo