I like it
I use an Apple OS X laptop as my mobile unix solution. OS X is not traditional unix, but I find dealing with its oddities no different than dealing with the differences between Solaris, HPUX, AIX and Linux.
The machine I got came with OS X and the developer's CD, so gcc gdb etc were included. I downloaded XFree and a window manager. So far all of tools I normally use on my other unix platforms are available in either package format or compile under OSX. Its been a pretty painless move.
The benefit is that I have a high quality laptop with a decent unix-like OS that runs all my unix tools that ALSO provides access to MS Office (grr, I need it for work), and allows me to run all of the entertainment apps that make travelling a little easier.
All in all a nice package.