

I know someone who flies down about once a month to help his elderly older brother and sister. (He is himself a retired senior, they are even older.) I presume he counts as 12 visitors a year, but of course, he’s just one person with family obligations.











The semi-vertical ones help compared to a standard (horizontal) mouse, but as someone who had a lot of pain, they were not enough for me. For example, I had the Microsoft sculpt mouse, which came with their split keyboard (the main reason I bought it) and still experienced pain. Then I went more vertical to the Logitech Lift which was better, but did not eliminate the pain entirely. Finally, I now use the Evoluent Vertical mouse and now no longer experience pain in my mousing hand.
The only drawback is when I used a standard mouse (totally horizontal), I used to switch hands and use it ambidextrously. Now I obviously can’t switch hands with these mice.
I think for someone who doesn’t experience persistent pain, a semi-vertical mouse may be well enough.