I bought these due to the very low price for 5 balls and they will suit my purpose for a production of many balls but if I bought them for their normal purpose I would be disappointed. They look and feel cheap and the special ball actually rattles. The innards are not solidly together so not only does it rattle and talk but it rolls in very strange ways due to the inner heavier part free floating inside. I bought 3 sets. They all do it to some degree. One set is much worse than the other 2. I gave it 3 stars because they are so cheap. If they cost what other sets do it would have recieved 1 star.