It started with one letter being too sensitive, then two, three, and some being unresponsive and letters flipping spaces. When I called Apple, I found out that there were recalls on this model with faulty keyboard function, but because I bought this refurbished on Amazon, it wasn't covered by anything, not Apple, not Amazon. NOT WORTH THE RISK. You pay for less quality device that lasts shorter, so in the end, not worth the initial savings.