It's a lot of fun. Theres basically sort of two time periods in it. The pre-searing and the post-searing, and you can go through each. I haven't done a ton, but I already know I prefer pre-searing atm lol. The PvP mode is pretty kool, cuz at the last beta they let us use all the skills/spells there were even if we hadn't unlocked them yet.
-Lord Elessar
PS: This should go under "Guild Wars General"
PSagain: This has been here since last November and you've only just noticed it? O.o