I have used the Heavy Putter for well over a year now. I have the heaviest weights in the putter. I believe my putting has improved dramatically since using this putter for the simple reason is it is impossible to move your wrists with this putter. You have no choice but to use a pendulum (?) motion in making the putt. It took some practice to get the feel for the putter and figuring out how hard to hit the ball for a short putt verus a long putt but once I found it, I have had some tremendous putting rounds. One of the best weapons in my golf bag.