Work fine in my little car, but my mount are "creative" so its actually mounted off the hatch frame ( 5 door hatchback ) which are at a 90 degree angle to the glass.
It should work fine on a truck rear window, without having to add some wedges to the equation.
The only advice I'd add would be to try to avoid getting the rear defogger wires in the video or covering them with the 3M pad. Those pads stick pretty tenaciously. If it's stuck on top of the wire, I think it might make it difficult to remove without pulling the wire off the glass.
Originally I had this installed in my Dodge Ram...I jammed a 2 inch wide piece of sheet metal up under the headliner and glued the camera to that...otherwise I couldn't install it. BTW, I did not have any vibration issues.