I want to start off by stating that my decision to purchase these BMB came down to free shipping and the reputation Vulcan has from my previous purchases from them. I bought three BMBs two (12lb, 16lb) which recieved last month and a 20lb which I am still waiting for since it was a pre-order purchase. I wanted a set so my wife, daughters, and I could all get a piece of the action. Here are the reasons why I decided to rate them a five star. *One, the BMB material is unbelievable. When holding the ball while preforming any exercise it has a nice grip that helps you complete the exercise without feeling like the ball will slip out of your hands. *Two, the BMB is solid. Slaming or throwing the ball for wallballs is an easy task for the the ball. Even after slaming it a few times the BMD retained its original shape. Three, the embroidered logo and weight identification that will not fade or rub off adds value to the product. Four, knowing that the BMB carries a "Lifetime Guarantee from bursting or breaking" gives me confidence that Vulcan utilized a lot resources into this product. I am not in the business of slaming the balls until it bursts but it's nice to know Vulcan will stand behind the BMB. Two things that I did not like. First, the smell of the material is a little soapy for me. I think it will take a few more months for that to go away. This smell is just a sensory thing for me so please don't be discouraged based on this part of the review. Second, the price is a little more than I wanted to pay for three MedBalls. It would have been nice if they sold these in sigles and sets. Sets would be discounted if three were bought at the same time. I almost canceled my order because a competitor company was discounting a set of three almost one hundred dollars. Overall, I am glad I made the purchase and hope to have these BMB for a long time. Thank you Vulcan!