yep got one, had it running for a few years now.
pros
-rocks!!, gps, music, movies, the lot in one, fully customisable
cons
-slow boot times unless you mess with it and get it booting quick(can be done)
-no radio for me at the moment, but there are (expensive) modules available
-not for the average person, you've gotta want to have the carpc, theres plenty of easier multimedia headunits these days that do very much the same thing without the headaches.
in saying that, im still in the process of building a newer smaller carpc for my vp.
link to pics of my current pc
Index of /pictures/carpc
and of my in progress pc
Index of /pictures/vp/carpc