Mac vs Pc

I'm in the market to buy a laptop for the wife for Xmas.I REALLY wanna buy a mac book but never owning or even paying with one has me scared to pull the trigger.I was wondering if you guys and gals could give me pro's and con's on both units.She really doesn't do anything special with her computer now except surf the web,face book,etc. I will use it for pictures and of course FABO. Thanks