Easy to install as soon acknowledged his connection to a USB port! In addition there are 2 USB ports at the rear of the case to compensate the port utilisé.Les keys are a bit small, but they are flexible, accurate and complètes.La engraving symbols is visible, as are 4 LEDs green (power, NUM. 1 and for each USB port) .J e have made it 4 stars because I do not know the reliability of the pad.