£2 for light and postage and packaging - very good value, although it did take about a month for delivery. The quality is similar to a knog that I already have. The light is easy to use, fairly robust and quite bright, with several types of flashing mode. The beauty of this product is you can attach it to several places - no bracket needed. I sometimes attach it to the bungees that hold my bags onto the back rack. It will wrap around the tube holding the sadle. It is waterproof and has a pleasant texture. The button is quite responsive - much more so than the Knog. When storing it, it takes up very little room. At £2, there is no excuse for not having a back light.