Bought a TB 15" base model in store last week. I loved it for the first few days but began to notice some small issues. First, when watching Youtube videos, the video screen would glitch for a split second. Secondly, the brightness of the screen would flicker whenever I am watching something on Netflix fullscreen (only occurs in fullscreen mode). Then I noticed that the screen would glitch in the login screen. I read many complaints concerning the latter issue, and although some people suggested that its a software issue, I decided to exchange my macbook for a new one. They had the product in stock so I was able to exchange it today. However, my new MacBook has the same exact issues and possible even more. The middle of the screen suddenly glitched during Netflix fullscreen mode for a split second. Only occurred once so far. Now I'm afraid to exchange for another product because it seems that I will get another defect. My previous laptop was the first retina MBP 15" and it is shocking that my new macbook already has more problems. The new MBP seems to have so many different issues and I'm wondering if there is anyone who has no problems at all with their MacBook?