update...
so took the z for a local meet here in town and decided to not put my windshield visor up just to get it a little hot in the car and test out the main ball mount. It didn't look like it affect it in any way? I took the car around town and it held pretty well, mind you I'm on powertrix coils and 3/4 to stiff so my ride can get bumpy sometimes. No issues holding my iPhone 5 with case.
i don't know about other phones, different sizes and weights, all i know its working for me. We will see in the next few weeks and see how it does over time.
sorry for the crappy phone photos... you get the picture though.
