I like the way the perfect ones play. I go through only 10 new DHS D40+ every six months. However, more and more of them have defects from the factory. If you hold the ball up to a bright light, you will see dark spots on the defective balls where part of the the plastic wall is thicker, about 1.5mm in size. If DHS would not sell it's factory seconds, and only sell good 1st quality I would rate these a 5 as the best plastic ball.
