i have UPDGRADED to vista...loves it. Truth be told, I have encountered no problems, and none of the errors many proclaim. I have never encountered a bsod on Vista, during all a few beta stages and retail with my Ultimate (or rather, oem)
works, great...and does what it does well...at least IMO.
I run mainstream apps, new and old, dosbox, emus from all over. Works, no BSODs. Yahoo tends to hang it...but that's more yahoo than not. Use it for chatting with family.
But today I got the sp1 installed
Also, yahoo sent a note about Yahoo for Vista, finally! So got that going too.
If you know how to really use your computer, and you don't expect silliness where it shouldn't be...then you'll be ok. Much like the people who buy firewall apps, and complain that the firewall app keeps giving them warnings! Buy a product for what it's meant for and not what you wish it could do, and you're all set.
and you tend to not have so many problems with legit software