Vista works great for me, however I don't do a lot of processor-heavy tasks. for those who find Vista runs too slowly, an even less processor-heavy OS is Linux. for beginning users, I suggest Ubuntu: http://www.ubuntu.com/getubuntu/download
@Coyote8: Firstly, I'm entitled to my opinion; whether you agree with it or not is entirely up to you. Secondly, you and you're customers are most likely a tiny portion of all Vista users, if it works for you great - doesn't mean it works or suits everyone. Thirdly, I don' think it's a shiner XP - assuming an assumption is very hypocritical.
The fact that after 2 and a half years of it's release it's to be replaced by Windows7 later this year kind of speaks for itself.
My sincerest apologies to the other users who perhaps felt this comment was unnecessary.
@ SphynxNHS: I don't know what you're talking about, vista works great for me and my customers. You just need to spend more than five second trying to learn the system, and lose the assumption that it is just a shinier WXP