I use a beam type to see where I am (like an existing preload) and a click type to see where I want to be (like head torque). My go-to is the clicker. Like a talking clock, it gives positive feedback in any orientation, day or night, whether you can see it or not. The beam type is more like a sundial. Only works when the light is right and you can see it, and its value changes depending on the line of your eye to the scale.