Difficult to put on and to insert the metal lock piece. Seller sent red version rather than clear variant, that's why I'm deducting a star. However, once on, it fits perfectly and is comfortable. I use the PA variant, which is 100% impossible to get out of.
It's a flimsy and very inaccurate design where the independent pieces doesn't match each other. Because of that the chastity can't be assembled and you can't insert the locking mechanism. It's a complete rubbish not fit for purpose.
It landed in a bin. Looks like it's being produced from some cheap printer and no single element would much the other. An absolute rubbish.