I dont use such kit, I think it serves no better purpose to the average golfer than the club yardage charts. The accuracy required to benefit from these things is Scratch upwards. But I believe the pro game would be greatly improved if the only thing golfers were allowed was club card and 150 yd markers on the course. This alone brings great judgement into the game along with great skill. It would be pretty boring to me to go to any course and know exactly how far from any point I was by looking at a machine. I get greater pleasure and satisfaction from working it out with judgement. it wont be long before wind measuring equipment,air density and gps will be linked so that golfers no longer have to judge what club and how far off target to aim. Next will come advanced moisture measuring kits that can work out how much more to put on a wet putt. I never like to see too much techno stuff on the golf course as I feel it takes away part of the games pleasure.But if people didnt have crap to buy to keep up with the joneses or to feel improved they would probably see theyhad too much money and feel guilt

Ive never met an ordinary golfer who has improved because they have used these gismos.