I'm a tall person, and have to use the Medium/Tall mount to get my Navdy in the optimal position. The Short mount looks very cool, but it just doesn't work for me.
The main issue is how the Medium/Tall mount attaches to my dashboard. It would seem to me that the 3 little "feet" on the plastic ring should come down and rest on the dash, but these is a 1mm gap, which allows the mount to vibrate significantly, especially at freeway speeds. I've cranked down the part that screws in as much as I can, but the gap remains. It was a mild inconvenience in the winter, but as the temperature increases, that rubber foamy part is loosening up more and more. If I take my hand and press the mount down, it works great, so I know the problem is the foamy base, not the Medium/Tall spindle that holds the display.
The only picture I have handy is slightly out of focus, and I'll try to get a better one after work.
This picture shows another problem I have. The plastic disk that sticks onto my dashboard has a difficult time staying stuck. My dashboard is a hard plastic, but it is textured with tiny ridges, which reduces the surface area that it can effectively stick to. You can see in the picture how it is pulling away from the dashboard, and I frequently have to pull the mount off and put pressure on the disc to flatten it out.
The solution that I came up with in my head is to somehow use the Short base, and have extensions that attach to that in order to raise the power puck up to a level that works for my eye line.
ARE those 3 feet supposed to touch the dashboard? I feel like that would solve the problem, or at least ameliorate it.