Classic BioWare. Plays like a Diablo game but in a third person shooter aspect. Read my review for more depth.
The game itself plays like a point and click and the combat feels almost turn based. If you zoom all the way out it's almost exactly like playing a Diablo game, with that BioWare touch of entertaining story that captivates you. If you are into RPGs this will definitely draw you in and impact you emotionally once you've played it, which in itself makes the game worth buying.
If you are thinking about getting Dragon Age 2 first, you should absolutely play this first in order to upload all the choices you made in Dragon Age: Origins and see them come to fruition in a seemingly entire other world. Altogether this is a masterpiece of a game and the only reason I gave it a 9 and not a 10 is because the combat system was annoying.