I developed pretty nasty tenosynovitis in my inner wrist from using a Magic Pad over a year. I even tried switching to using it with my left hand instead of my right, and eventually developed the same problem in the other wrist.

It got bad enough I opted for cortisone injections.

This was about 10 years ago. I’ve avoided Apple’s input devices since, opting for proper ergonomic keyboards and mice, with no further RSI thankfully.

Same with me. I use a gaming mouse on the right from my keyboard and a trackpad on the left. Very convenient for me.