Protecting the back is OK, at the sides of the keys to longevity will show only after several months or years. The pressure point of the keys has intensified and is (unpleasant) become louder. Turn on the unit has become much harder. Without fingernail moves nothing. Off I leave now automatic. Accessibility of the USB / AC adapter plug has not changed to negative. The touch feeling is somewhat coarse and stubborn. Spare already for the original Kindle Leather Folio.