I got it off steam about a month ago, its definitely one of the best games I've ever played. And I have a USB ps3 controller, and it works perfectly fine.
But in terms of community, and lore, nothing has come close to this in years. Not to mention the gameplay is awesome, very well done. And it is also the best pvp rpg since D2 imo(though I'd argue D2 was more gear based, DS is more skill based since basically any gear combo can be viable if you are good enough to play it).
Definitely will be hooked on this one for a long time.