After testing out the new macbook air 2011 I was so dissapointed that I returned it to apple. This thread is aims to give a heads up to everyone that is tempted to buy it and to make them reconsider. I had two main reasons for buying the Macbook air: 1: Flash storage and no fans would mean a completely silent computer. 2: With the new i5 processor and other hardware enhancements I was convinced that this very slim and easy to handle computer would match the performance of older but bigger notebooks. Dissapointments: 1: When streaming video to my LCD tv the macbook´s fans started making lots of noise. The noise was louder than I had ever had on any laptop before so the thought of a silent computer was given up. It is only when pushing it that it starts making noise. It´s very quiet when just running applications though. 2. I noticed that it was lagging when I was browsing the internet. First I thought that I must have had some other apps running but even after shutting down all other apps and also restarting it was still lagging when browsing google results. We tried it side-by-side with an older model of macbook pro which made it very obvious that the air simply could not handle even scrolling down a webpage without lagging. That was it. For me that meant my two main arguments for buying it was now lost and I returned it to apple. Conclusion: Do not buy the new i5 2011 Macbook Air - the performance is very slow and does not match the pricetag.