Been doing "heads-up" for all putts over 10 feet for about 2 years. It's superb for long lag putts and big breakers. I also do it for shorter putts with lot's of break. It's been crazy good. Of course, occasionally you stub your putter or miss on the toe. I use a Scotty Futura 6m because of the long blade and I believe hugely important for this method, the high MOI. I'm a higher handicap guy but would be much worse if my putting like this didn't save me.