This is a great training/teaching tool. Beginners can hit with higher level players and have extended rallies. Teaching pros can hit with students and work on stroke development, form, and topspin. This ball is slower than a tennis ball, is about the same weight, has the same bounce and is lots of fun. Even advanced/tournament players like warming up with the ball. The only drawback is the high price and the color quickly fades when played on dirty courts. The balls can wear fast, especially with advanced players hitting with lots of topspin.