Hawk - I've used it a couple of times. The weather has been really wet and crappy for the past week or so, so not too much riding. On the couple of rides I've used it, once was in broad daylight and the other just as it was getting dark. In broad daylight, I used the brake free light in stealth mode, so it lit up just as I was slowing down. When it was just getting dark, I used it in the full on mode (not flashing), and someone riding behind me thought that I certainly could be seen by anyone in back of me. I'm really pleased with the quality of the unit, and how easy it was to mount on my HJC helmet. The installation video that Brake Free Tech recommends you watch before mounting the unit to the helmet helped a great deal. All in all, I'm extremely satisfied. My wife, who watched me pull out of my driveway, said she could see the brake light up when I slowed down before pulling onto the street. And that in bright daylight with her being about 70 feet away.
I'll post more thoughts and hopefully pics and a video once the weather clears up. Speaking of which, it's pouring a thundering right now. We're supposed to have a break in the weather on Thursday, and then more rain on Friday and Saturday, with skies finally turning clear on Sunday and through next week. I wish there were some way to send all this frigging rain out west where they really, really need it.
Jeff