When I bought my iBook two years ago, it was difficult to adjust to the OS X operating system because I was no longer able to use certain programs that were Windows-only. Now that Intel Macs are able to run Windows as well as OS X, I think that switching is most likely a much less complicated process than it was before, since you can still keep using all of the programs that you've become accustomed to as a PC user.

Having said that, I can't recommend Macs highly enough. In the two years that I've had my iBook, I've only had one problem with it (and even that was my fault; basically, I didn't buy an external hard drive to store some of my excess files until it was too late). My advice would be to spend some time really using a Mac if you can, like maybe at a local library, so that you can get a better feel for what it's like to use the operating system for everyday tasks. I realize that you can always try out the display models in the Apple Store, but IMO, it just isn't quite the same as sitting down with it in a more realistic situation and seeing exactly whether or not it's a good fit for you. When I tried out the models in the store, I was always so much more focused on all the cool features that Apple wants its customers to know about and be amazed by, and it was only after taking my new laptop home and using it for real that I understood just how different the operating system was and what kinds of usage changes I would have to make.

Nonetheless, I have absolutely no regrets about getting my Mac. Going into it, though, just make sure that you're aware of what the differences are and whether or not it makes sense for you to switch over to a different platform.