Since we often moved our GPS from car to RV , etc and often wanted to just get it out of the way, we found anything fully attached was not good for us.
We like a bean bag system that is heavy enough to just throw up on the dash, etc and it has rubber type backing that keeps it from sliding.
It has several things we liked as we could pick it up and move it so easy.
While driving, we sometimes decide we want a break, but I don't have time to drive and study the GPS, so I can reach up with one hand, pick it and hand to her for finding and putting in what we want.
Then when we got to a site in the RV, we just Unplugged, stored the cord, and GPS out of the way!
We tend to trade cars, RV, etc. often and like not having any excess holes or adhesives to mess with resale value! Also it allowed us to use one system in multiple vehicles. Your choices on that may be very different?
Lots of types, size and shapes to fit what you might have?
https://www.google.com/search?q=bea...QYhgMYigWYAwCSBwQ4LjEwoAeckwE&sclient=gws-wiz