Vista is better than a pirated copy of Windows 7. (If you can't say something nice about an OS, do not say anything at all).
End of Dr's quote
I've been running Vista since the first public beta and I have never found it to be the pig some people claim it to be, and thus have nothing bad to say about it. In fact, I quite like using it... especially in 64 bit and the way I have it set up to suit myself. I'm using Tweak Vista to eliminate the annoying quirks of UAC, for example], and for me it is more than just usable. As stated above, I found little or no difference in performance between Vista and Win 7 on this machine... though I'd say the recent addition of a SSD would have upped the performance of Win 7 somewhat.
Why dual boot between Vista and Win 7? I like to keep Vista on my rig for MS Office, Photoshop, PSP and other art/photo manipulation programs, and Win 7 for music and video editing, etc. Hence I've not bloated either OS with too many programs all at once and therefore keep a sleek fast machine with fewer registry nightmares.