Thanks for these responses, war and HotRod.
I asked for two reasons: First, I did install it on my Sony laptop some time ago and although it seemed to work ok, the pc definately operated more sluggishly, so I restored a pre install image and decided to wait.
2nd, a good buddy who has Home on his desktop is asking me if it's safe. I've told him to wait for availailablity of a home sp2 update file, or turn on Automatic Update. He's hot to trot and doesn't want to wait. (Know that feeling?)