I was blown away by the little usb arm that plugs into the usb socket next to my computer, what a fabulous idea. They are easy to get on and off your bike, no tools is such a joy.
This light is for people who don't leave their lights on their bikes essentially though, you will have to take it off and charge it more regularly than if you buy a battery light, that goes without saying.
It's a sexy design, it's nice to see something that is feminine but not girly, clever and practical. There isn't alot in the world of cycling stuff that's feminine but still essentially practical and well made. Very elegant.
It's very bright, basically if you turn it on in your hand and point it at you, you do pretty much go blind for a second, so don't! (I'm sure you will at least once).
You need a back light that says hello, I'm here and despite it's size, it really does do that.
For the man who wants to buy the woman in his life a little stocking filler, this is a good one.