I am bone on bone after a couple surgeries on my left knee, I really like these braces and prefer them to the Anacondas, the anacondas feel a little bit too bulky for me. I bought 2 of these to try, liked them, and immediately bought 2 more. The only downside is that the adhesive on the parts that have velcro starts to wear down after several washes so you are left with flaps of velcro hanging off, and on one or two the main velcro pad is starting to peel off at the edges. On one or two also the straps themselves are starting to fray around the edges. The braces are still functional at this point so for 30 bucks it really isn't the end of the world. These are new products and I'm sure Gold will continue developing them until they are perfect. The other thing that would be nice is if they offered a version without the metal spring side supports as technically these aren't IBJJF legal. Overall a really great product with a little bit of room for improvement. I love the protection it offers for those of us with high mileage knees.