I am an avid Keymouse Track user. I have used logitech trackman from its beginning. I am very grateful to have found and to use the Keymouse track. I have used them for well over a year while in a resting position. I have a dificulty with using a computer station while sitting or standing for many hours. I looked for quiet a while for a zero gravity chair that I imangined that I could sit in while using a computer. One day while searching on the internet I fortunately came upon the Keymouse Track. I also found that some adjustable beds achieve the zero gravity position. Like the astronauts in the Spacex crew dragon. I use two 21 inch monitors overhead placed side by side just closer than fingertip reach. When I sit up, the monitors are a few inches above the top off my head so there is no issue with getting in or out of my workstation. I have placed foam wedges under each keymouse to lift the inside edges a couple of inches to reduce my arm/wrist rotation. I use the Tracks at my side. Wonderful. I use layers like Cameron Purdy does. I use the keys under my fingers in layers rather than reaching to the keys on the outer edges of the keyboards. I feel that a smaller design without those keys like the Alpha would be good. But in my case I like the large size because they are so stable. A while back I attended a long 4 hour company teleconference meeting. It didn't occur to me until after the meeting, when my co-workers complained of the length of the meeting that it was so long. It was then I realized that before covid I would have been in the meeting room, being super uncomfortable. The benefit of covid for me is that people have found teleconferencing works and now I can be effictive working from home. When google meet started the ability to put up virtual backgrounds, a coworker commented about my new office looked nice and it was good to see me not on my bed. He thought I was upright. Also as another benefit, since I can't see the keys I have become a much better touch-typist over the last year. I use the left track ball for scrolling.