I bought my 12" powerbook when it first came out about 4 months ago...and despite a few minor problems (it is afterall a "first issue") I love it. You can get Microsoft Office v.X for about $200, and it's better than Office for Windows, and 100% compatible. The 12" also comes with a 32mb Gefroce 4 mobile video card. Not great for games, but will run pretty much everything good on low resolution. I run MOH:AA on it just fine. Airport Extreme is also great as well. It's 54g wireless, and compatible with almost all wireless networks. If you've never tried OS X, I suggest you get to your local Apple store, or CompUSA and try it out. You'll be hooked. There are many things that you can't do on a mac, that you can on a PC, but then again...there are many things you can do on a mac, that you can't do on a PC. I highly suggest a program called Konfabulator. It's probably the best $25 I've ever spent.
...The build quality is also second to none. No one can touch Apple, and IBM quality when it comes to mobile computing. I've owned IBM, Dell, Compaq, and now this Apple, and it's like comparing "Apples" to Oranges!