Have been an Arccos user for three years. This watch does all of what Arccos does for only a one time cost of the watch versus an ongoing $170 a year or so for Arccos. I decided on the V5 after Arccos decided to adjust GOS distances of clubs for temperature, wind, humidity. I could no longer relate to the simple distance numbers I had been used to but were now "made theoretical". Nice folks at Arccos and a good product but Shotscope V5 offers all the right stuff without annual fees. Nice Job Shotcscope!