BackOff brake light flasher anyone?

Wondering if anyone uses the BackOff brake light flasher. It might be a "cheaper" solution to the 12oclocker DRC circuit board. Wondering how big it is and where to hide it. I like the fact that it provides an emergency flasher, too.

"Emit a visual signal of 5 short flashes, followed by a steady on light that remains steady on as long as the brakes are applied"


Signal Dynamics Website

I use the one from Comagination.com. Very compact and costs about 30 bucks. Works great, tucks away under the seat. Seems that cagers see it really well. I think flashing brake lights are especially important if you are using an aftermarket 'tail tidy" type of light that is not as bright as the stocker.