And I must say after being a Windows users since the beginning I am really impressed. At first I was unsure of purchasing Apple because I was afraid I would have to spend so much time relearning an OS, but the portability of the macbook air helped me take the plunge. The transition was very simple. I sat down and went through all of the programs I used on my Windows PC, and realized I had a lot of wasted stuff on there. I then spent a little time browsing google for Mac equivalent programs. I found everything I need, and I'm running OpenOffice for the time being so I haven't spent any money on apps yet. I was excited about the gestures on the trackpad and surprised at how quickly I began to use them all without even thinking about it. I even attempted to scroll up/down with two fingers on my old Windows laptop before I realized I was wasting my time. I would say I am comfortable with this OS, and the entire transition and it has only been about 10 days since I first turned it on. I like to think I am a little more computer savvy than the average person, but to any Windows users who are worried about the transition I say do not worry at all. Everything translates quite easily and you should be up and running 100% in a matter of a few days, a week or so at the very most.