It's doing better now. It had a shit ton of bugs when it first got released. The patches they're releasing now are fixing a lot of the problems and adding features people have been clambering for, like the mail system and improved UI. They're getting an auction house in the next patch, methinks.
As for the game itself, It's still somewhat repetitive. It's basically Diablo II but with optional first person view. It has a lot of items and I love treasure hunting, so I liked this. Maps are randomized, but still linear. The different classes are pretty cool offer a lot of different styles of game play, so replay exists there. Storyline is pretty minimal. Theres a lot of reading and clicking through text, so you'll just start skipping ahead. Nothing that blows your mind. Also, it's definitely pretty if you got the video card for it.
If you can find it on sale for 20-30 bucks, I'd say its worth it. I blew most of my X-Mas break on the game. They have a subscription service where you get access to more areas and more items, but I wouldn't drop any bones on that, yet.
TL:DR - It's coming along and they're adding stuff all the time. Kinda repetitive. I'd say it's worth 20-30 bucks.