I am for a month the owner of the Crystal Case for my MacBookPro with Retina 13 inches. Had no difficulty in mounting the product. Only while losing weight I had damaging problems and also scared my notebook here. It is also disposed of a little plastic case. There are also quite a few light stains and scratches caused, but do not interfere. Only if you look closely you recognize the flaw.
On the whole, I am quite satisfied. It nevertheless fulfills its purpose and protects my MacBook.