The original MR's worked great and lasted for years. Now IMO they are too thin, making them too flimsy. For the last few years all you see are players and refs trying to get all the balls touching with new balls. Either the company has caved in and made them too thin because of people complaining about balls rolling off when breaking or they made them thinner to not last as long or both. Just as many balls rolled to a good place rolling over it as bad things happening. Pretty soon they will be taken as long to rack with the new MR as they do with the wood or metal ones. Johnnyt