@brett I use one. It is very nice used in combination with a mouse. You can rotate the object independent of what you are trying to click on with the mouse. I'm so happy it "just works" with freecad now. It used to not be compiled in to all builds. I am not an advanced cad user. I could see it being awkward to not have a hand on the keyboard if I were faster and more advanced. I could see how the more advanced one with many macro buttons would be good.