I usually wear a metal chastity device but my mistress and I decided to try this one. For being so well known and so expensive, this one was very disappointing. It's over engineered, with lots of parts that seem unnecessary. It's very unsanitary compared to a metal cage. It's hard to get on unless you use a lot of lotion, and then it still cannot contain everything. There is some slippage with a metal device sometimes, but this one terrible for keeping everything where it's supposed to be (my testicles kept retracting through the ball ring, no matter what).
I strongly recommend going with a good metal chastity device instead.