After about an hour of practicing on both the TopsinPro and the Eye Coach I had a hit yesterday on court and what an improvement it made straight away!! These products are excellent.
I started playing tennis a couple of months ago after 25 years of not playing tennis. I have struggled with my one handed back hand with the ball flying way over the baseline but yesterday 90% was in.
Thanks so much again, my wife and I will definitely benefit from these devices.