'Bit late for me to be weighing in on this topic, but I have the Breakaway unit on a couple of my bikes & Love them. I was primarily drawn to them on the basis of safety--I like being able to just nudge the brake lever to cancel the resistance on the throttle. I have arthritis in both hands & have coupled the Breakaway unit on the ST with an older version Throttlerocker to ease the load on my right hand. The Breakaway does require a lot of Fiddling to set up properly--I compounded the application by also having Hondaline heated grips & having added the wider-bladed ( & adjustable ) Kuryakin Gold Wing levers. The right lever required some re-shaping with the grinder to get a bottom-edge profile that would clear the housing on the Breakaway & still trip the release cam. I also had to shim the Breakaway mount at the lever pivot L-bracket to get things to line up at the grip. Yes, that is a lot of Mucking About but it makes a big difference in keeping my paws functional & I think it was worth it...for me. The biggest drawback on the Breakaway is the price. Maybe we could Arrange a group buy? I bought 3 at once ( a long time ago ) & they let me have them for $175 each. Just a thought.
Dave