I did it many moons ago. I would not change back. I had no problem changing - a small learning curve, but Apple's operating systems are very intuitive. They come with useful free software out of the box. I'd go into an Apple shop and have a play and a chat to the people inside. If you have Adobe products you can contact them, tell them you are moving to a mac from a PC and for a small admin fee they will exchange - I think often for newer versions - certainly cheaper than buying from scratch. Also don't forget that if you have a family member or a friend is a student (primary school to university), you can borrow proof and purchase Adobe education versions (full versions, just cheaper).

My parents made the change a couple of years ago - both retired(ish) and both have managed fairly easily - though to be fair I still occasionally have to talk them through something on the phone or show them/take over their mac on iChat to show them how to do what they want to do.

Mr. Gates and co would really have to raise their game if I were to consider switching back to Microsoft running computers (apart from possibly the Courier (not technically a PC) - do a google search it is very very impressive). But as I have already said, go have a play. If you do get one, feel free to holler if your stuck on something.