First of all, let me start out by saying that I love Macbook Air. Apple really knows how to attach emotion to the devices they make. It's something that no other company can do with their products. If I had to pick one major fault for Macbook Air (1 USB port and lack of CD drive don't really bother me) is that it is noisy. For a product that's designed mainly for light weight tasks, fan reving at 6200rpm after watching youtube or running screen saver is not favorable. From browsing around the forum, I started to think that the source of heat issue on Air came from the way Apple applied thermal paste. Poor application of thermal paste is a common practice for many companies and I guess it was also an oversight that Apple has made. So I pop opened the back. I've done it by unscrewing screws in the back. It is probably one of the easiest laptops to open its innards. I was greeted immediate with the heatsink. I was surprised. Heat sink is nothing but a thin plate of aluminum. No fins. No nothing. I unscrewed the heatsink from the PCB. And viola... As you can see..they overused themal paste. This isn't a sandwich. It's a CPU core. After a clean up. Much better Applied Arctic Silver 5.. Then I reassembled everything back up. Ran youtube..and waited for the temperature to go up. Result When watching youtube video at full screen for 10 min. Before Core temp- 71 c Fan- 6200rpm After Core temp- 63c Fan- 4200rpm Needless to say. HUGE improvement. If you got a noisy Macbook Air...and if you got the gut to open up and reapply thermal paste..I'd say go for it.