Vista just works.
Any small quip that I ran into was either fixed with a simple download, or registry tweak. I
love Vista. I think it is by far Microsoft’s best OS. I run the 64-bit version of Ultimate, and I have to say that using Vista has been a
very positive experience for me, and I think many problems, not all, lie directly with the user more than anything. Check your hardware and software before you upgrade, so you're not surprised when something doesn't work afterwards. If you fail to assess the situation before you upgrade, and Vista doesn't work with something, then that is clearly your fault.
I have still heard of people saying they have had issues after the upgrade, and that they made sure their hardware was up to par. However, they fail to say that "up to par" is the bare minimum required by Microsoft. That's just crazy. Microsoft never puts the appropriate minimum specs on any OS in my opinion, and if you upgrade meeting only the minimum, then I suspect you will most certainly run into problems at some point or another. That is clearly Microsoft's fault, but it certainly isn't Vista's.
I have still heard of individuals stating that Vista is screwing something up, and yet when the situation is described in detail, I am unable to duplicate it. That makes me wonder quite often how it is that my particular copy of Vista escaped these dreaded faults. I guess I must be real lucky.

Every piece of software I have installed that said it was either designed to work with Vista, or specifically for Vista has done so without issue. Again, I guess I must be real lucky.
Real issues with the OS (as with all others before it) are not to be used as an end all escape goat for user incompetence. Yes, there are some small issues, but they are minor in
my experience, and the “major” issues I have come across have ended up being user error. That’s my experience, and so that is what I am speaking from. No offense to anyone meant.
Vista just works.