I haven’t used single arm to its fullest extent but have a great deal of success with using Siri voice commands to open apps and using the double tap to cycle through menus and start functions

So far I’ve only used it while I’m walking with my coffee in one hand - i use siri voice command to start workout walk and double pinch gesture to hit start.

I see myself using it to dismiss things while driving or dismissing reminders. I struggle to get it to work if im not sotting or standing upright.

Nicer band.