Like many people I am disappointed that the ball is only rated for 8,000 lbs.  However, I was aware of this before my purchase.  I like that the balls can swivel, but don't care for the way they change.  Sometimes you need a coin to be able to release or lock the ball, it would be nice if it were tool-free.  This is the second set that I bought, so I would definitely recommend this to a friend.