The kegel balls work amazingly well, I love that they are wireless ,the battery was already installed in the remote and was pre-charged in the ball. The vibration settings are comfortable, you can adjust the speed and intensity by the contrl-set. The non-vibrating set is like a reindeer bell, it has a smaller ball inside that moves around whenever your weight shifts. The packaging is discreet and beautiful. Overall great buy and I highly recommend.