I noticed this on a motorcycle ahead of me in Daytona during Bike Week. Don't know why I waited so long as the visibility is unbelievable. Should be on all bikes. Safety plus. I give it a 5 across the board.
Cheap but very bright alternatives to stock signals. I found the included nuts to be kind of small to mount on my bike but a set of washers I had laying around fixed that and they haven't budged since.
Be careful when installing and not over tighten the nut. I had a previous set that I really cranked down on and it pulled the hollow bolt thing out from the rubber.