THANK YOU! I have several grip exercise tools I use (I suffer from Dupuytren's) and this one does something the others do not. It exercises the muscles required to open the hand as opposed to the crushing exercise the others offer. I throw a few in my work bag to fidget with at work and keep one in my truck to use while I'm waiting in the pick up line to get my girls from school, practice etc.>
So far so good. You have to put a lot of water into it so that you can really have it rebound back to you, but it does the job for someone who is learning how to hit. Claudio, Brazil
The Champion Smart Tennis Sensor is an excellent product. In the application I believe that the speed curve could have more points identifying the speed because the bands are very large, 40 - 80 - 120. It would also be cool a comparative between days where I could compare my best performances.
But both the application and the sensor pleased me a lot and are helping me, especially in the forhand and backhand graphics. Jimmy, USA
Customer Service is amazing! The finger flexers themselves are awesome! I made a mistake with the shipping address of my order and called customer service! The gentleman that assisted me was so understanding on the phone and immediately solved my problem! Thank you again so much! Cathy, Germany