I've got the RPMtesla one, it sucks.
The foam pad is janky. You just glue the pucks into the right spot on the phone holder.
It didn't work through my Quad Lock phone case -- fine, that's my bad, the case is thick and only just works on my wireless charger at my desk.
Switch to my Apple leather case which is super thin. Phone keeps triggering in and out of charge mode on the RPMtesla one. The charging puck makes a big bulge so the phone doesn't 'lay' flat, it sorta rocks around.
Phone goes flying any time you go around a corner.
Basically, it doesn't work unless MAYBE you run a phone with no case and never drive around a corner or accelerate hard.