Debated for a long time whether to go with Cista or XP for my new pc. Finally, after long discussion with the system integrator, decided to take the leap and go with Vista. So far so good. There were lots of initial problems, including the dreaded blue screen of death, that was hard ware related problems, and now, been stable for about a month.
Knock on wood, no problems. Granted, I do not install much onto this pc at all, just CS3, Office 2003, Firefox, an occasional game, and whatever appletets that is needed to make it run.
Most of the time, the pc is not even online