First, the price is about right for a keyboard and a wireless mouse with nano receiver discreet enough (size = 4 cm). The keyboard is quite nice for input. However, I would point some disadvantages after 9 months of use: - Nano is supposed to be clipped under the mouse for transport, for example except that the location is too small and the nano beyond! It is incomprehensible that Microsoft had not spotted it. - The absence of light for Num Lock and Caps. Very annoying when tapped by mistake Digital Lock. - The digital locking and Up / Down keys are stuck. In fact, it was soon pressing num lock by mistake instead of Up. - The functions of the buttons are very small and underground, which is not very pleasant to the touch. - The battery in the supplied mouse lasted 5 months (Duracell yet)! Yet I well étaignais mouse with the button provided. - No button to turn off the keyboard (so battery depletion.)