@Beege , could you share the one you bought that didn't work? Also, what the diameter was for the suction cup, so I can eliminate it from my searching.
@Kazz, the video on Amazon shows the range of operations, so definitely check it out. My brother had the non-Qi version of this mount, and it was very good: stable, adjustable, and easy to operate one-handed. This is currently very high on my list of candidates now.
@SEA Stinger, were you able to suction directly to the dash surface, or did you need to use the adhesive pad under it?