OSX is one of the best OS i've ever used. Its very easy to learn, stable, and has the best little perks.
I'm addicted to installing programs on my ibook because I love dragging them places
The only advice I can give is to make sure you have "applecare". Things probably die, and you probably will have problems. (ie: power adaptor etc) Getting a new adaptor for free or whatever else you may or may not need beats paying for it
