I wasn't hoping for a lot - just a satisfactory mount that would hold the GPS steady. I mounted the GPS to the steering head on my bike, and using the standard arm, the GPS peeks just over the tank bag and just below the instruments. Just loosen the handle on the arm, move the GPS to the exact position and angle you want, and give it a twist to tighten. It stays right where you put it. The bases and arms are constructed of marine grade aluminum, and powder coated for a durable finish.
All hardware is either brass or stainless steel.
The rubber balls are injection molded directly onto the bases, so they can't come loose. The system holds your gear firmly, but also offers vibration isolation through the rubber balls.