Or as Joel Spolsky puts it:
I’ve been using Vista on my home laptop since it shipped, and can say with some conviction that nobody should be using it as their primary operating system—it simply has no redeeming merits to overcome the compatibility headaches it causes. Whenever anyone asks, my advice is to stay with Windows XP (and to purchase new systems with XP preinstalled).
... Jim Louderback, the newly departed editor of PC Magazine, who uses his farewell column to do something I suppose he has wanted to do for ages—tell the truth about Vista. “Why, nine months after launch, am I so frustrated? The litany of what doesn’t work and what still frustrates me stretches on endlessly.”
... “I could go on and on about the lack of drivers, the bizarre wake-up rituals, the strange and nonreproducible system quirks, and more. But I won’t bore you with the details. The upshot is that even after nine months, Vista just ain’t cutting it. I definitely gave Microsoft too much of a free pass on this operating system.”
(via Daring Fireball)