I bought this set for biking around town and trail riding after dusk. They are very bright and I have no issues with the lights themselves - very easy to use and easy to charge via micro USB. The light mounting brackets attach very solidly to the frame but the reason for my lower rating is the connection between the headlight and the mounting bracket. After using them for the last 2 months the only problem I've had is the plastic bracket that is supposed to lock the headlight in place is broken and the light does not lock in place anymore. The light still slides into the bracket but when I ride rougher terrain the light slowly vibrates out out the bracket since the locking mechanism is broken - I need to keep sliding it back in or it will fall out of the mounting bracket.