I've never owned a range finder but I've owned several GPS units. I had a Garmin Approach G10 for a few years and at the end of last year I decided to try a Garmin Approach S10 watch. I gave the G10 to my son. I've used the S10 watch now about four times. I like it as it's quick at telling me the yardages to the front, middle and back of the green but I found that I missed the feature that allowed me to move the pin location on the green. That comes in handy on larger greens. I decided to sell the Approach S10 watch for $90, although I haven't done anything to do so yet. I got a new Garmin Approach S40 watch. It remains to be seen how I like this one.