I like it. I haven't had a chance to look at memory leakage yet, but it certainly does render faster.

You can put the tabs back under the URL bar (where they belong, damn it) by right-clicking the upside-down triangle in the tab bar and unchecking "Tabs on top."

You can also get the status bar back with this guy.

(It's not that I oppose all UI changes, but I think the tab position and status bar weren't broken at all, and these changes are just an attempt to be more like Chrome.)