I have used this for 3 months always in its cover and with keyboard attached(i.e.fully protected)..after 3 months a horizontal crack all across the screen developed..it was not dropped,bent or anything like this(wondering if temperature changes are to blame)..even though it is still under warranty and there absolutely no signs that it was ever dropped(no dents/scratches or anything like that on the frame)Lenovo just declined a repair under warranty..I find this unbelievable ..do not buy Lenovo products..they dont stand behind their products..