I like the quality of these shoes, this is the third pair that I've purchased. I'd had issues with knee pain prior to getting the first pair.  Since I started using the Beast, I've not had this problem reoccur.  I purchased this pair for my wife and while she likes the cushioning and stability they did rub blisters on her toes before they were fully broken in.  She's not had problems with them since they've broken in though.