I used my Hi-Glow vest the first night I got it. WONDERFUL! I felt very secure knowing that I was very visible to car drivers. Before I had received the vest I had wondered how effective the LEDs would be if you were leaning forward, as some of the older LED tail lights were fairly directional. Anyway, the LEDs in the vest give excellent all round light output. The reflector strips are great and, of course, the colour of the vest makes the rider stand out during daytime use.