After the wife previously bought me a inexpensive C-ring, i decided after a few months to upgrade as it became a staple of the bedroom collection. I decided to go with this during a bondara 50% sale and glad i did. The motor on this is so much more powerful, and as an added bonus is USB rechargeable so you don't need a box of batteries with your toys. Compared to the other cheaper model, the silicone is thicker and harder, so can be quite complex to get over the balls due to the lack of stretch, and can also be quite tricky to remove for sure. The extra level of vibration does add some great enjoyment, but to get a 5 it would need a more stretchy silicone. Its advertised for her pleasure too, however it will never sit straight so will not hit her "target areas" 3.5* great vibration, and great tightness, however wont sit straight and can be a pain to take off.