My yardage is off 20 to 75 yards. I played the course that I play one to two times a week. Drives are off a good 75 yards, 8 iron is off 20 yards. Don't think I am suffering indoor swing syndrome. I changed the elevation to 10,000 feet and the humidity to high, not much difference. I bought the R50 because of my limited indoor room. My Mevo+ would only pick up my short irons. I was told the R50 would work fine as long as I had room to swing a club.