I love this device. I use it on my subby on a full time basis. We made some adjustments to it so that it can be worn for long periods of time. You can see the pain in his face when he tries to get hard and he can't cum, so I just can't keep myself from making him masturbate with it on. It takes about 5 minutes before he is begging me to let him stop playing with himself. I let him take it off about once a month for a night if he is being good because it does make him sore. He's had it on for about a month now and his balls are turning the prettyest colors! He hates it but he is the one who picked it out in a machosistic moment so all the more fun for me!