Vic bought one and brought it onboard Rhapsody during a few races. I've got a full TackTick suite, so it was an interesting comparison. Personally, I did not find the Speed Puck useful. The head/lift indicator, because it isn't getting wind data is marginally useful. SOG is useful with currents, but I did not find it any more or less useful then the Garmin GPS, and with my TackTick network I can put SOG on the display I want, when I want.

Perhaps Vic will chime in since he may have more experience with it now.