I got the Kensington Orbit a long time ago, never looked back. I use the trackball with my left hand for daily work, and a mouse with my right hand for gaming. I also constantly switch between the native US layout on my keyboard for programming and a German layout when writing. Using both hands and two layouts sound crazy to most people at first, but it feels perfectly natural to me now.

It’s hilarious when colleagues want to use my computer, though.