I'm pretty impressed as well. In general, the site seems faster and more responsive. And I really like how the menus have been moved from the left side of the screen to the top, allowing more room for the all important caching information:
My biggest complaint: the site does not seem to be entirely Chrome-compatible. Google Chrome is my default browser, and I've had some issues. The biggest problem so far is that I cannot "log my visit" from a cache page. If I click on the link, the site takes me to a blank page with an ad on it, like this:
So for now, I have to switch browsers anytime I want to post a log. I've also noticed some strange text placements in Chrome that I don't see in Firefox. Hopefully, these issues will be corrected soon. Other than that, the improvements are much welcomed.