My First Trackball (9th May 2011)
Today I started using this particular form of static mouse since my broken wrist makes it hard to use a regular mouse. It certainly spares my wrist from all movement but it’s so difficult to move the pointer quickly or accurately. My fingers often started twitching because they aren’t used to operating like this.
After some web searches it seems to take about a week to get used to them. A week later, I agree with that. One trick I found was using one finger as a brake, between the case and the wheel, while another actually moves the ball. This ensures accuracy by slowing the motion to avoid overshoots and mis-clicks during slight twitches.
Still a lot slower and less accurate than a normal mouse. But my joints are feeling far less stressed after a long day of mousing. They certainly solve that part of the problem.