[greglepore]

I never would have thought I'd like such a thing, but now that Wahoo supports it I gave it a shot. Wow, best 200 bucks I've spent on cycling in a while.

For those who don't know, its a radar unit that audibly alerts to cars from behind, and shows where they are graphically along the edge of the head unit. Generally, it alerted me significantly before I heard the car. The best part, though, is multiple vehicles-you always know exactly how many there are and when the lane is clear again. It really reduces the stress level.