I remember buying it when it first came out, years and years ago, and the two major things that kept me from really getting too far in it was the fact that the class I was playing at the time was kinda buggy (I was playing the pet based class and i ran into a lot of issues that seemed like that should have been taking into account when the game released) and the fact that I was inform the best way to get anywhere in the game was to rotation around the first zone i was in to level up fast.
Now mind you, I played this back when I was still my WoW headed nature (Ignore everything, get to end game), so I can't say I would have stuck with it, but I've NO idea how much the game has changed or updated since then.