I just downloaded it to see how it looks. Unfortunately it automatically closed while I was googling, and I think that has something to do with my machine's lack of RAM thanks to the SP3 update.
But I immediately noticed the lack of a shortcut key for the tabs, and the menu commands do not seem to be there. I think this will take a little getting used to before I can say it is a good browser. (And yes, more RAM is on the way to try it again later.)