Neverwinter Nights 2 met my expectations, and in fact exceeded them.
First, the technical:
I was a bit worried about the Mac version, given the reported technical issues when the PC version first came out, but the game performed very well. I kept expecting a problem, I did not experience a single crash or major flaw in the whole game. Not once. It performed better for me than NWN 1's latest version.
My machine is a 2.8G dual core Intel, 2G memory, 24 inch iMac, running Mac OS 10.4.11. The game never even slowed down, even with multiple characters in large battles, with all kinds of spell effects going simultaneously. Very impressive.
The game itself:
The graphics were beautiful. I didn't buy it for that reason, but I have to admit the graphic sure are pretty, and since they didn't slow down my machine, they certainly added to the atmosphere.
The camera controls took some getting used to, and in fact I had to set the sliders for scroll-speed, ect, to slow. However, once I got used to them, I no longer had to really think about it.
I found the story quite engaging. I have played NWN 1 with both of it's sequels (SoU and HotU), and I found this on par with those in terms of story-telling experience. There's plenty of interaction with your party NPCs, and new 'influence' system.
From a D&D standpoint they've made a few small changes, added a few classes, and fixed a few balance issues with Rangers (which many people had thought were underpowered previously).
Overall, I give it 5 stars.