Has anyone used it yet? Any feedback?

Been using it as a beta tester for a little while. It is much more flexible than the previous ones in the sense that you have more freedom with the settings and customization.

I've played with it, but it's still a bit buggy. There are some features missing that I would have liked to see, but can't please everyone I suppose...

When I have some time I'll start sending in the bug reports, and report some very minor security issues (nothing to worry about, but always good to fix these things). The software itself is a very nice step up from 3.0, but I'm holding back for a little while before putting it into a production environment.