My first impressions of this game were not good. The story starts out way too fast, with almost no character development. 1 hour in and I was contemplating returning it. However, I gave this game some time and it got a lot more enjoyable.
The combat is fast paced and has enough nuances to keep you on your toes without feeling like you're just mashing buttons.
The character development tree is very deep, and gives you a huge amount of freedom to customize your play style. I played as a pure mage, and had a lot of fun with it.
Lots of people have complained about the item system being too complicated. All I have to say is that if you can't manage an inventory, you have no business playing RPGs. It was just as good as any other RPG item system.
The characters of the game do become a little more developed over time, but you never really get attached to anyone like you do in a game like Mass Effect, Dragon Age, or Skyrim. This is probably the biggest disappointment of the game.
To sum it all up in one sentence: It grows on you, but its no Skyrim.