I have an RT, so the bike itself has a place to mount an accessory brake light higher up so it's more visible. But, I recently rode with a couple of F3's and realized any accessory brake lights mounted on their bike wouldn't be high enough to have the visibility they should. Then, I looked a little more into the helmet-mounted brake light. This one is a recent startup that's getting some good press. Does anyone have any experience with it, or similar products?