I got one of these ball crushing electrodes for my partner and we had so much fun getting to know it and use it. He was surprised by the sensations that it can generate and it can be used for pain or pleasure. I noted the comments in the previous review but we didn't experience any of the problems mentioned. If you don't hang low you can use a nut and washer to prevent the problem mentioned.
Fitting it was fun as my partner has very large balls, we found it easiest to push one through at a time and then to push his penis through last.
I really enjoyed restraining him and using it on him and he also enjoyed solo play sessions with it. His parting words after the first time he tried it was "Bloody hell, my balls had a real workout and it was so good, I've never felt my scrotum tugging before in time with the pulses and I like it".