Honestly, I've avoided Vista simply from a lack of need. I own a copy of XP and it does all I ask. Vista offered little of interest to me, though I do like aspects of the interface. Although... while it is a badly designed OS, I've yet to see this horrible, BSoD'ing system that some people and those crappy Apple commercials make it out to be. It can be with bad drivers, but most people I know that use it seem to use it without issue these days. Either way, it's good that Windows is moving on to something that could be really good. 7 offers improvements to my computing experience, thus my enthusiasm for it.
And also, for laptops going from Vista to XP, make sure you can find drivers before buying(
) a copy of XP for it. Some models do not offer XP drivers at all.
And while I'm posting here, I thought I'd gloat a bit and say as of Friday, I am an Apple Certified Macintosh Technician!
I'm not sure how much I'll get to do (I got it for work mostly), but here's some guts of a white MacBook. Over 9000 screws.