I recently started using a mac book, and the operating system in ok, a little hard to get used to where thing are from using windows for so long, but it is a little nicer layout. Although somethings are in just really stupid spots. Also they crash a lot more then my windows based laptop. (i don't own the mac book, its my schools)
Add on top of that pratically no customization, or upgrade potential you come to one thing IMO.
Mac = Epic fail to Anyone who knows what they are doing, but they are a very nice/refreshing alternative now and then. Again IMO, some people love them when they get to know them better, but im not one of them. And im not a fanboy for windows.