Recently found this on eBay and mounted it on a Ram 1" ball to my PC800.
I can turn it Portrait or Landscape to match the app I'm using.
I liked the idea that it held the phone at the corners and there was no way for it to "slip" out.
Besides I have some buttons on the side of the phone that an "X" type holder would conflict with.
Has a USB port already built in to the back and I bought a short 6" patch cable for the phone.
So far, so good. Only having to deal with the massively reflective screen of my Droid Turbo.
Most of the time I look down at it to see the GPS app... I mostly see myself.
For what it's worth, it was $15 on eBay.