The 4.5-inch suction cup mount from K&F Concept is a real highlight for anyone who regularly films in the car with a camera or action cam. The workmanship is impeccable, the suction cup sticks so firmly to smooth surfaces (e.g. glass, bonnet, side windows) that you almost have trouble removing it again — which is of course ideal for safety. Particularly noteworthy is the combination of a strong vacuum foot (up to 60 kg horizontally) and the flexibly adjustable Magic Arm with ball head. The adjustment is quick thanks to a single wing screw, but is then bomb-tight. I've tested the setup with my Sony RX100 VII so far and plan to use it with the Alpha 7 IV - no problem for this mount. It brings a real professional feeling to the rig. The included adapters for action cams and smartphones make the mount universally usable, e.g. for Insta360, DJI Action or GoPro. The 1/4” and 3/8” connections, including ARRI positioning holes, allow additional accessories to be securely mounted without anything twisting. The only minor criticism: It takes quite effort to release the suction cup, as the quick release is a bit fiddly. But there is a safety indicator (“warning line”) on the pump, a useful detail. My personal conclusion as a freelance videographer/photographer:
For anyone looking for a stable, low-vibration solution for shooting from the car, this mount is a real asset. Robust technology, clever design with truly versatile uses! And from now on, it's an integral part of my camera setup.