I've been using mirror mounted phone holders for a few years now and the ones I had before would always break or the connectors would get loose so the phone would fall.I really like how adjustable this one is. Being able to widen the top and adjust the height of the arms made it fit the mirror better. I think the spring tension helps it stay better too. I also like how adjustable the arm for the phone is. Depending on what app I'm using I need it to be landscape or portrait and the longer arm allows plenty of room for both. So far the anti-shake feature is working really well. I drive for Uber so I need the screen to be steady for directions up to 12 hours at a time and I haven't had any issues. This is a really great product, glad I decided to switch.