I have the Niterider MiNewt X2 Dual, and I love it! It *definitely* keeps drivers from pulling out of driveways and sidesteets in front of me on my busy commute route. I use it on blinking when I commute during daylight, and on steady when it's dark or near dark. Since I also use it to see the road, I don't actually aim it into drivers' eyes, but it has a big enough beam that they notice it.

Jenn