I'm blown away by your product... v5.1 easy-off! Blowjobs are up by 1000% - as my wife doesn't find them a chore anymore. It stayed on no problem, no leaks, pretty easy to take off and slap another one on.
P.S. Will reorder another, bigger, box this weekend! Please do send a few extras - I will share them with friends.
Derek S. ~USA