it does work, and I do like it and I do use it.
i recently used it on a trip, and i struggled with it. The mount kept falling from my windscreen, it would hold for about 3 - 4 hours then drop. My iphone has a battery case, the mount could not hold onto it, so I had to remove my battery case from the phone, not really an issue, but I could not charge both of them at the same time.
for the price, it was worth the money. as I said, it did the job, it just fatigued after about 3 hours and would drop off the windscreen.