weighs a little 5s but doubled the battery life, practical motorcycle for long journeys with music, GPS and the essential Coyote nibbling all the energy of the iPhone in 3 hours ... Velvety and silky very nice in hand. One star less for the difficulty of insertion and withdrawal, and especially the obligation to verify the positioning of the side switch to prevent it from being blocked: the previous model for my iPhone 4S with dock was taken not so difficult to remove and above, whereas with this, we hesitate a little to the handling, shame! (Copy of my review model for red ....)