I bought this keyboard in August 2014. He broke down yesterday: it turns off 10 seconds after startup. I checked, it's not food. So it has worked very well 6 months. Moreover, I have some keys that begin to lose their coating. Too bad, because I was very happy with this product. It's been expensive operating time for a keyboard of this price. For information, my G15 worked for 6 years. I will therefore highlight the attic. I'm pretty disgusted with Logitech because I was used to using good products so far: webcam, mouse gamer, HP, helmet.