I like them. I switch off to them sometimes from the hi level Nike's. I like the G25's meter of 4 and I have had luck using the Nike 61 & maybe the 42 red.
I'll test them w/ the Call 37 yellow. (I did not like the results w/ the Cally 37)
..and the 33 would be great.
I would use these during a blitz when I'm streaming because of the slower meter.
I avoid real slow meter balls w/ the G25s because they are already 4 meter. Too slow of a ball throws me off.
Here are some of the courses I have had good scores using the Pings.:
Congressional F9, Kia B9,
moderate 1under/par on :OAK B9, RSG B9, RSG F9, Congressional B9, OLY B9, STA B9, Merion F9
I didn't have good results on Pinehurst, but this is only my experience