Hello, Last month, I got myself the base model of the 13" MBA, I really love the machine and came to realize that it is pretty much all I need for daily work (including Lightroom). The only hiccup I have is that sometimes the screen just shuts off and it takes a few keyboard and mouse clicks before it comes back like nothing happened. It started with Lion and continued with Mountain Lion. It would not be a heat issue or CPU load as it's been doing that when I'm simply browsing, or working on photos or reading e-mails. The first time it happened I had it on a book that was approximately in the middle of the laptop, so I thought it's pressing too hard (its own weight) and something is shorting out... although it happened a few more times after. Today it happened again and it was simply on the table.