Review on PowerNet Weighted Progressive Technique Coordination by Chad Myers

Great product for sports activities. I use them on my 10u touring team and they helped the team hit the ball and complete the backswing. The balls also provide instant feedback for batsmen and coaches. I've found that some balls are a bit harder than others, which isn't a problem but more of an observation. We also have one of the yellow balls (12 ounces) that warped a bit after about 50 hits, but the others are holding up great after a couple of fairly heavy use workouts.