Expose your putting sins!
May 30, 2014
This simple idea is nearly flawless. If your setup favors your eye right over the ball, this will give you a perfect sightline when the red "stripes" disappear. It also promotes an ascending stroke by even wobbling after the strike on near perfect hits. I've used it to compare and test putters, different strokes (inside/square/inside) and straight thru strokes. After trying my closet arsenal of putters, it confirmed my best roll is with my old original Nicklaus MI 615, (the largest putter allowed BTW).
It's a valuable tool that won't set you back very much, can carry in the bag and takes no time to setup like most putting aids.
Pros:Simple, effective, portable and pretty reasonable considering this will outlast your current putter!