I purchased one of these this weekend:
I no longer play grip games while lining up a putt. I'm getting a little arthritis and this year I've noticed myself fondling my putter excessively when getting set up. Not sure if it's minor hand pain or lack of confidence over the ball but adding one of these has helped me. I know they're laughable and look atrocious but it's helped me.
I'm curious about others who've tried one of these and if you liked them enough to continue using or went back to a more normal size grip.