Spring to hold my Nexus 5 and OnePlus One (with cases) works just fine... strong grip...just be careful when taking your phone out, LOL... be sure to catch your phone, takes a bit of coordination on my part :)

I wonder, too, about the longevity of the little flexible plastic grip used to spread the jaws

I paired the IVATION Universal Tripod Stand Mount, with a Bower Steady Pod pistol grip tripod