For whatever reasons, I’ve favored the odd-numbered Fedora releases (and the odd-numbered Red Hat releases before Fedora), so I was predisposed to like Fedora 13. And I do like Fedora 13.
I’m not sure what else to say. (I gave up on VMWare hosted on Fedora — trying to accomplish that wasted much of my time with Fedora 11 and 12.) I’ve now, as of Sunday, got Fedora 13 in all of my production Linux environments plus several others. I can’t remember any noticeable problems migrating from Fedora 12, so 13 must be lucky.