I am required by the golf club I caddy at (one of the finest in the nyc area) to use a range finder/lazer when I caddy. I can tell you the yardage to the pin, middle, front, back and bunkers, both with and without my range finder. I can also tell you that all the loopers at WF will have them as well, and 99% of the Metro section PGA pros will have them and be using during their tournament rounds. The reason my club requires them is pace of play, not saying it works or not, but most of our members would be pissed if I didn't have mine when they are hitting their approach on #1.
Cliff - If you have a caddy who knows what he is doing, he wont just hand you the 7 iron. He will say he likes 150 yards.. I will notice what wedges you like to hit around the green, or maybe the hybrid because you hit it on 8 of the first 9 holes, but it otherwise it puts the caddy in to much danger of being wrong. Only after a standing relationship will I start to pull clubs... I even told the pro I sometimes loop for that the I'm not clubbing him any more. I will only give him the yardage I like because when we are about 190 out and he wants to know if its the 8 or 7, those numbers just dont make any sense.
Sean - I have yet to have someone tip me less because I'm required to use a range finder. I promise you that I will make your golf experience that day better, and will be worth every penny on the greens.. they dont call me the magic caddy for nothing!
Bill - 1. I'm no bag carrier! 2. What happens when you get an old school southern caddy who grew up loopin since he was 12, can read greens, but cant read or add because he never went to school? Do you want to spend 4:30 on the golf course waiting for him to add it up or would you rather he pushed the button while chasing you all over the country side?!