vBulletin went straight from beta 28 to Gold release with no release candidate versions and they even upgraded their official forums to it. WTF. There is no member list, no users online list. Notifications are horrible, its buggy as hell and looks like crap.
The only thing it has going for it IMO is that the mobile version looks decent on a cell phone screen.. but even then I came across some 503 errors and pages that failed to load. So buggy. They say "Enjoy a clean, up-to-date design that supports easier forum navigation for members and visitors alike." I don't care for their idea of 'clean, up-to-date' it doesn't look up-to-date to me at all. In fact the page navigation floats at the top of the screen in large forums with multiple pages of topics. It took me a minute to even realize it was there. For a basic default skin, this looks horrible.
It has less than half the features of vB 3.8 and searching doesn't work. All the search results are "unexpected_error"