Laser Range Finder - whenever I'm in between yardage markers and/or at an angle near or into the rough, I don't EVER have to guess my distance to ANYTHING. FWIW, I use a Bushnell Medalist. It's not difficult to use - meaning you don't have to have the steadiest of hands - due to it's pin-seeker technology that recognizes smaller objects that are vastly closer that other objects in the range of view, like the trees 50 yards behind it. If your pins have reflectors, it doesn't even matter, it's ALWAYS dialed in. It does help - sometimes when I will play at a course that doesn't have them, I will have to be a little more steady and it will take a second before the pin-seeker indicator in the viewfinder confirms that I'm indeed on the pin. At my home course there are reflectors, and it's a simple as point and shoot and it's dialed in as long as I'm not trying to do it while I'm walking, bobbing all over the place.