We are using this as a cell phone holder on our bicycles. It is easy to install and holds the phone securely in place. The only thing that keeps it from 5 stars is the swivel nut has to be really cranked tight to keep the phone from moving around. I am a little worried that I will strip the plastic threads.
It holds everything with confidence. I have had one on my Harley for a couple years and around 15,000 miles without anything coming out of it's grasp. My only complaint would be the pivot ball doesn't hold it completely still. It is only plastic so don't over tighten it. Nice product for the money.