I love my Trackball Explorer. I was getting wrist pains (RSI) using a normal mouse and so I switched to the Trackball Explorer because when using it the hand i

I love my Trackball Explorer. I was getting wrist pains (RSI) using a normal mouse and so I switched to the Trackball Explorer because when using it the hand is in a natural position and the ball is controlled by your thumb - which has 40% of your hand's neural wiring. When they were discontinued I bought 2 spares to ensure I could continue to use one. They all still work.