Just as a public service announcement, pay attention to the fitment of your snap-on hard cases. I bought a Kuzy from Amazon: http://www.amazon.com/Kuzy-13-Inch-...5?s=electronics&ie=UTF8&qid=1383432970&sr=1-5 It added a little bit of bulk to the laptop, but the fitment seemed to be OK. To my eyes, it looked like all was well, but I noticed that my battery life was terrible afterwards: going from around 11 hours at full charge to about 6-7 hours at the same levels. I also noticed the fan was noticeably louder as well, whereas normally I would not really hear it at all. After some troubleshooting time, I decided to take off the bottom side of the Kuzy case, and sure enough, within a few minutes the fan noise started to die down. I checked my estimated battery life a few minutes after that and that also started to climb back up to normal estimates as well. Thankfully, I am an Amazon Prime member, so I have initiated a refund for this Kuzy case with no hassle at all. Seeing as how I did not like the additional bulk from this type of case, though, I will go for a skin instead. I have had great success with the bestskinsever on my iPhone 4 and 5, so I will go with them again for my rMBP: http://www.bestskinsever.com/other/laptops/macbook-pro-with-13-inch-retina-display-skin Just figured I would pass this along to save someone the baffling troubleshooting time later on if they run into the similar issues.