I got reeled in by the ROADID commercials during the TdF. Really glad I got one. Wear it 24 x 7, even to a pig pickin, where I "sold" between 8 and 10 of them to moms, aunts, uncles of cyclists, and to some cyclist themselves.
When I got mine my dear daughter said, "Dad, if someone reads this, they will think you escaped from intensive care." My reply, "I know, I am trying to do something about that!" Get one.