Yeah, really liked those but it eventually died. I still have the wired Logitech trackball in the middle one but never liked it as much.

I used trackballs for ages but I actually preferred the trackpad when I switched to a Mac even though I had always hated pads on Windows laptops.

Maybe you should try the Kensington Expert Trackball. I have a Macbook Pro at work and an iMac at home and use the Kensington on both for over 8 years. A great trackball, IMHO better than Logitechs.

I've tried and sometimes use a Touchpad, which is hard to beat when I'm mobile. But I still prefer the stability of the ball, its inertia, fine control, and especially its clearer semantics for compound operations. Too often, I find that TrackPad multibutton ops (esp. Force Touch) will miss the mark.

Thanks. I may give it a try. I'm pretty happy with current Mac Trackpads (to the point where I see no reason to use a mouse or anything else on my laptop but always looking for more comfortable input devices.