Made the switch in February ... and it was the best thing I could have done, money well spent too.

No blue screen of death [ignoring the leopard issues] ... no virus and spyware crap, faster integration with Adobe software .. everything is easy to use.

Installing apps is just dragging them into the app folder... and reverse for uninstalling them.

Vista ... it can be done, so no problem there, and if your a coder/designer, I think it would be a good change :]

Go into an apple shop and play around with one, see if you feel comfortable with it. I have the MBP and to begin with everything was wierd, but you get used to it very fast ... and everything computer wise just becomes easier.

Microsoft Products like Word and Excel, there are free alternatives like NeoOffice which do everything for you.

Hope that helps :]