I'm running windows, and to me the font smoothing is too much. Smaller text becomes almost too chunky to read. On windows it crashes as soon as you try to type in your proxy password and you can't edit the proxy settings (the button is greyed out in preferences.) It seems to render pretty quickly, but I was testing at work and it seemed to lag on the initial request, like the Microsoft network protocol was stopping it and saying "What are you doing here?" : ) All told, I don't think I'll be switching away from firefox. Safari currently lacks the plugins I've come to depend on, and I just don't see anything that really makes it worth switching. Based on the text alone I don't see myself switching over to Safari as my default browser. I know it's still in beta but I see myself sticking by firefox. However, I'm very excited to see Apple opening up it's browser to windows users. One more browser I can test my sites on now.