After multiple years of using Game Golf, I switched to Arccos this year (because PING was giving away the sensors for those with eligible PING products). To be honest, I didn’t mind the tagging with Game Golf at all; it had become an unconscious part of my pre-shot routine.
For my part, I’ve found Arccos to work extremely well; it likely missed only a handful of shots all season (and most of those were when I duffed a chip and had to hit a second; Arccos won’t generally record two shots from essentially the same location, so it struggles with those).
The other issue I had with Arccos became a feature; I’ve had two different putter sensors die on me. The batteries in the second generation of Arccos are not replaceable, so a dead battery is a big deal.
But this ended up working to my advantage. Putting tagging in Arccos is pretty dodgy, to be honest. So it forced me to manually add putts.
My procedure was to hit the first putt, then pace off the length as I walk to the hole. I know other guys who do that as part of their pre-shot routine, but that’s not for me. That allows me, as I’m walking to the next hole, to plot the hole location, the distance of the first putt, and the total putts. From there, Arccos can calculate the strokes gained.