I tried the DivotMat at a local golf show a few weeks back. It’s essentially a large sheet of paper with a bunch of balls printed on it. You swing the club at one of the balls, and your club makes a black mark on the paper, showing your swingpath. By comparing the marks to a guide, you can tell whether you’re hitting fat or thin, slicing or hooking, a draw or fade, etc. I was tempted.