Safari is fast, although not having tabs is annoying, I got very used to them with Chimera and Mozilla on my PC at work. The only downside is there are still a number of sites out there that won't work on Safari. Verizon Wireless, for example, lets you check your minutes remaining for the month online--but this only works on IE 5.5+ on a PC. IE for Mac, Chimera, Mozilla, Safari--none of these work. Another example: I had to print out a temporary health plan ID card from Aetna on my work PC because of the same problem--no Mac browser would render the page correctly.
This is Verizon and Aetna's fault, of course, not Apple's, but I'm worried that because Safari uses Konqueror and not Gecko for layout, the odds of any company testing their website on Safari are nil. My fiancee used to work for a dot-com, and they only tested on IE and Navigator on the PC--she asked why she couldn't get the site to work properly using Mac IE, and their reply was "no one uses Macs". This kind of attitude seems to be growing--there are a lot of sites on the web that don't display right because their creators only design for IE. If enough people used a Gecko variant like Mozilla/Chimera/Phoenix then maybe that tide could be reversed, but I'm afraid Safari will always be too minor for anyone to care about.
Having said all that, I'm typing this in Safari now and I like it--I'd urge everyone who does like it to find websites that don't display correctly in it (most likely because they don't follow standards) and write them nasty emails for thinking the only browser on Earth is IE. Maybe if enough people do that, the web will truly be open to everyone and not "best viewed with Internet Explorer (Windows version)".