Well, looking on what I've heard, is it's multi-threaded doesn't do well with the Flash plugin, due to "sandbox" nature. Also, you shouldn't haffto test with "another browser" with Chrome, seeing as it's webkit, therefore if it works on Safari, it works in Chrome (and the JS is ****ing fast!)
Running on XP pro here too though, and it installed. SP3.
Really damn fast, makes browsing sites such as Digg nice, due to the heavy JS usage. Also, using this random JS test I found, Chrome scored 40 ms, and FF scored over 200ms, Safari beat FF with 175~, and IE lost with 500+ ms. Looks like it'll be interesting, especially seeing function wise (dragging tabs out into new windows, etcera) looks like Safari, but done right for Windows, which = win.