This works ok, within the first few uses the little rubber bumpers were falling off, but gravity still holds the unit in place.  The spread of the two mid point grippers have a gear mechanism that can be forced to jump teeth to facilitate closing non-symmetrically to accommodate phone plugs to clear the bottom supports...I found this useful for my Samsung 5" player as I was able to offset the right mid holder about 3/8 of an inch. When you get this...add real glue to hold the sponge rubber bumpers to keep them from diapering.