I have been using the club fuel gauge for a few months. Like every other dipstick gauge I have tried over the years it is not accurate. It is useful in judging the approximate "fullness" of the tanks- 1/4, 1/2 or 3/4ths full. I use it before every flight. Unlike the old tube style dipstick, the new one cannot accidentally slip into the tank when used by a butter fingered tester. To me this is required equipment.