Not getting it yet, for two reasons:
For one, I am a bit worried that it's main focus is combat (being IWD themed), and I am playing more for the story and the general feeling. However, I didn't have a chance to check out any in-depth reviews yet, so the worry might be completely unfounded.
The main reason why I am not getting it yet is that there isn't a physical release. I bought a boxed copy of the main game, and I'd like to have boxed copy of the expansion too (even if it is just like the Skyrim DLC, a DVD case with a Steam code inside). With the expansion split into two parts, I guess there's a bigger chance for a physical release once Part II is complete. So I'll be waiting for that.