They're working out some kinks very soon, if they haven't already. Patches for balance issues. Other than that, it's fun as hell.
It's gone back to it's roots, but it's got all the flair you could expect of today's games. It's refreshing.
Though, it's still a 50-60 dollar game right now. If you don't really want it, rent it or find a bargain/wait for it to go down in price.