Ok, Mr. Unknown beat me to the punch because I was too lazy (and busy) with ski patrol last weekend. he provided a good baseline report, mine will be less technical and more observational.
1. Full runtime on mine was 3h45m. I don't think my battery was fully charged, however.
2. The o-rings are cheap. I already trashed the tail cap o ring. Off to the hardware store.
3. Highly visible in daylight. Just what I wanted.
4. My LED was not perfectly centered, but WHO CARES. I'm not using this as a flashlight.
5. The Led unit is a drop in and you could replace it with another drop in if you wanted to use it as a flashlight. Double duty! Bonus.
6. My wife thinks I'm going to attract airplanes (my commute takes me past Portland International).
7. It was 10 dollars!
8. If encouraged, I would still be willing to take pictures of daytime and nighttime compared to my Niterider rear light and Superflash.
pdxsteve