I bought it and used it several times, and then I ate it. This is the same as wearing tennis. It's all hype of marketing number. Originally, these things were icing on the cake, and the marketing number became an artifact. It seems that buying a strength can make a huge leap immediately.

I personally think that if you are a fan with limited training time, you don't need these things at all. It takes several rounds to feel that boxing peak navigation is far less practical than practice.