Wow, lots of great info on this subject. CNOSIL nailed so much great info, I won't add much. Even with all the data & tech available, a very good fitter is still a key to putting tips specific to you, while he's using the technology. Obviously, Reading a green is critical, once I found a putter I absolutely have faith in, all I need to know is, do I hit my ball where I intend to hit it.
I found a 48" ruler, just wider than the golf ball, is my final training aid. If I can pick a distance and hit it straight without it falling off that rail, I know I have my face square, and that is wh