I wrote out a fairly lengthy review discussing the social psychology of online communities that have been around long enough to evolve into a social organism, and the life-cycle of the general MUD player, but I would rather keep it simple and short:
The best review of the MUD I can offer is to come try it for yourself. Strike up or join in a conversation on chat. Participate in a trivia quest. Run around and explore. Gain a few levels. If you don't like it, that's fine, we won't be mad.
I'm betting you'll like it, though.