I own a MacBook Retina and I have to tell you this is the worst purchase I've ever made.  You cannot type or use the track pad without losing all of what you have typed because it is way too sensitive. I've moved my hand over the track pad and lost a 4 page letter last night; writing this little review the cursor has moved to parts unknown at least 10 times. Now try to imagine; You own a computer that you can't use the keyboard to type. What good is the computer? You can't even answer an email without finger picking the keys. If you don't believe me Google Macbook keyboard too sensitive and read up on it. I wish I had.