Tristan R.wrote a review of Portland Design Works Danger Zone Tail Light on December 8, 2015
Familiarity: I've used it several times
The Good: Bright and I liked the attachment system.
The Bad: Just back from my third ride with this light to find that the front of the housing (the part with the lights and batteries) had become separated from the back somewhere on the road. I had had a fairly fast decent and hit a few potholes, but nothing out of the ordinary. Unless you ride only on extremely smooth roads, find something better.