As of now? It is extremely close to DnD. I mean it is DnD and the devs made sure it felt like playing the original. I like the fact that I barely have to look up anything when I level up. Because I still remember what skills are good or not from my time playing and DMing. Also the game looks great, sounds great and the companions are a delight (except that goody two shoes killjoy Wyll).

Oh and you have a lot of freedom. Freedom to fuck up and suffer the consequences. Which I enjoy very much!