Paul Thurrott has a good essay up today on Vista and how ready it is for prime time. It is tempting to call this the nut graph:

Is Windows Vista ready?
No. God, no. Today's Windows Vista builds are a study in frustration, and trust me, I use the darn thing day in and day out, and I've seen what happens when you subject yourself to it wholeheartedly. I think I've mentioned the phrase "I could hear the screams" on the SuperSite before. My wife said that to me one day, and she was referring to the sound of me barking some primeval curse at my desktop PC as it succumbed to Vista's stupid slowdowns, crashes, and hang ups for the umpteenth time. She, more than anyone, knows the frustration I've experienced because of Windows Vista. But even she doesn't know the details. They would bore her, frankly. She's normal like that.

There's much more to the article than that and it's worth a read.