I have used a trackball for many years since my wrist started bothering me, and I love it. I am right-handed, and I use Logitech's 575 and MX Ergo. I prefer the Ergo, even though it is more expensive. I keep it beside me on the couch where I sit. That way my elbow makes a 90 degree angle. Very comfortable. My keyboard is on my lap and my monitor at eye level.