I’m using it right now to type this and everything seems in order. It feels faster than Firefox 3, the interface is nice and clean and I’m generally revelling in the nice newness of it all. Interestingly it seems to have a spellchecker built-in that doesn’t recognise the word “Google”…
Anyway, anything I might say about the browser this early will end up repeating most of their hype, and that is done much better by this comic strip they released.
PS. Currently the beta version is Windows only with Linux and Mac versions to follow..