I bought one for the RG (BAL-1), and after driving with it, and watching people literally change lanes to avoid being behind me at traffic lights, everyday, bought another one for the Fat Bob.
Best money you can spend (IMO) to avoid getting rear ended, and it's American made, and warranted for five years, and takes less than five minutes to install.
Now I actually make it a point to not hold the brakes on at traffic lights once everyone has settled down and stopped. No negative comments from anyone, and lots of positive comments from other bikers.
You will be noticed!