Speed - This thing so far has it in spades, aces of spades no less. Its more responsive than the 3.0 Firefox release, even on this old junker of a computer that I use at work. Switching tabs is smooth as can be, loading pages is fast for the most part (unless the designer was a complete moron) and even the url guesstimation field is quick on the draw and generally quite accurate also.
Looks - While not as fancy as a dressed up IE or Firefox the minimalist setup is rockin and gives you the most viewable realestate by default of any browser I've used so far. The initial blue theme might make me cringe by bringing up thoughts of Windows XP's out of the box configuration I suspect in proper fashion Google will open up to themes fairly fast.
Rendering - So far doing my usual daily surfing I have only found two sites that had any real noticeable errors when viewed through Chrome: facebook's pictures code breaks and wont let you scroll through the pages of photos on a profile; and the World of Warcraft Armory displays the tooltips for gear completely wrong, having them appear so far from the cursor that triggers the effect that you can't read most of them. Amazingly enough even the code for this blog is rendered without any mutilations or disfigurations, and thats saying something considering the hack job I had to do in order for it to work right in the first place.
Security issue aside I'm quite impressed with what the browswer has to offer so far and given Google's mind for innovation I suspect there are many more amazing things in the pipe for Chrome as it continues to make waves in the oceans of the browser war.
