Have to credit a great, inexpensive product. Got a PeakPulse 600AC for under $60. Flag lock vibration, slope, been matching it side-by-side with my buddy's $400 Bushnell and always consistent within a yard (he's pissed, I'm thrilled). Accurate to at least 250 yards so far (I don't use it off the tee typically if hitting driver) so should work for most players. Uses AAA batteries. 7 rounds in using for myself and two friends. Still full battery life. Have never used a rangefinder other than cart GPS previously and it is helping shave strokes.