I installed the Release Candidate of Windows 7 on my computer at the end of last month, and before, I used to have windows XP pro. And my computer is now 6 years old and I replaced its motherboard after it passed on a few months ago. So far, Windows 7, for what this operating system can do, runs so smoothly than when I had XP home and pro versions.
But the only thing that's giving me an issue is my graphics card that is pretty old and I have to replace it, but fortunately, I was intending to replace it anyway.
Microsoft finally got this one right!