Yeah, I've been playing this game (on and off) for a few years. I was there when Death's house was still in the city limits. Basically, there are plenty of guilds (classes) to join, plenty of quests to try (and the site gives you the solution, if you can't figure them out), plenty of places to go, and plenty of people to talk to.
Best part? You aren't limited to your own guilds skills. Given enough time (nothing too long), or a proper teacher (which can be another player, if you'd like) you can learn the skills and abilities of every other guild. If you've got the exp to spare (which isn't overly hard to obtain), you can even teach yourself.
Overall, this is a good MUD, certainly not a waste of your time.