Very strong suction power and robust build. I had my DSLR mounted on the arm and suctioned to the bottom of my glass coffee table over night and it hadn't come loose at all. I was able to lift my entire coffee table using only the strength of the suction cup. I was surprised with the amount of holding force and the simplicity of pumping the button with one finger to enable the suction. While testing this, I mounted my DSLR to the included arm and then mounted the arm to the suction base and shook it around but the arm was loosing itself from the base in short time. This happened each time after retightening the arm. I dismounted the arm, dismounted the camera and then mounted the arm to the base before attaching the camera which definitely kept it from loosening for a longer amount of time. I put it through the same test utilizing the included phone clamp and did not have the same issue at all.

The build quality is very high and is robust enough for most use cases. I would be very cautious mounting a heavier mass to this in high vibration scenarios but otherwise I would definitely say this is strong, trustworthy option to have in your tools.