I am currently typing on my repaired macbook pro, it took awhile and the a-stock replacement case had a few problems like missing foam bits, metal spacers, the electrical part under the disk drive opening and a broken off screw in one of the two power button locations but with some careful removal of the items from the old case and placement with a bit of superglue in the purchased case, it all went back together. And works which is what counts. It was a mid 2011 that suffered a coffee spill when only 2 months old put away until now. (in other words the new used case had been stripped clean which should be mentioned in the sales description) Otherwise a great instructional guide.