We play with the balls for about 10 weeks. Previously we have always lent us balls in the squash court. Which had a yellow dot and thus were slightly faster. Faster this means the balls jump higher and you have more time has to come to the ball. While we realize that we play regularly, we ordered these balls. With the red dot, the balls are somewhat langsmer and I can only say that that our level of play is just right. We play once a week and regularly.