The clips are well made. I bought 2 of them but only have a power box where I can use one clip at a time. I wanted to see how they work/feel before investing in a power box upgrade. Anyway, to use this on your nipples you really can't use electro jell becase the eclip will just slide off. So, without the jell the stimulation is quite strong and sharp, so adjust your power and intensity carefully! I like them and will continue to use them from time to time but I wouldn't go quite as far as saying they are amazing. I suspect each person is very different. Nothing against E-Stim at all!