The Tracer works great. The Tracer makes playing and finding my first tee shot when I play in early morning rounds in which I'm in the first group of the tee. Blinking red light usually stays lit until I walk to it.
Plus it always gets some great reactions from my golfing chums.

Great ball, actually works as claimed. I only used it on the last few holes of a round when it gets real dark and want to finish the round. Sent one into the weeds once and someone actually saw it from 40-50 yards away. Need these available in other colors so that your friends can play them too.