This device is very easy to use and certainly accurate enough for me. My wife's Honda had a bad paint job and I burned through the clear coat trying to fix it. After sanding and repainting I used this device to make sure I don't do it again! I was able to remove almost all of the orange peel without fear of burning through the varnish or paint. Looks great and she is very happy with it. It is very helpful to be able to compare my paintwork to the thickness of the "factory" paintwork. The manufacturer's thickness overview included with the instructions is very helpful. I will be using this tool on my own Toyota that has a one step paint job. The accuracy and ease of use of this tool helped me a lot and will put my mind at ease now.