Interesting marketing tool. I use a Ping Anser 3. The method of fitting that I use is to pick a length / lie that positions my eyes directly over the ball when I have a comfortable stance. For "technique", I use the "Quiet Eye". My routine is :
1- Plum bob to find the line
2- Take a few practice strokes while looking at the hole to imprint the distance with the force needed into my brain. I'll pick a spot past the hole for uphills and closer for downhill puts.
3- Focus on the ball so I can read the logo and pull the trigger without delay.
If the gods are with me, the putt drops, if not, I'm left with a tap in or maybe a two footer on really long putts.
Last year my short putting got so bad (mental anguish induced) that I used a LEFT HANDED Ping Anser 3 for two weeks to clear the cobwebs. Figured I couldn't putt any worse. When I went back to right handed I was making everything from 4 feet in.