OK a quick review
- Main story isn't very immersive, but it's enough. You're not chasing some uber evil (well, you're not leading a crusade against it, but it'll eventually get in you way, so you'll have to deal with it sooner or later), trying to save the world, but are a person who was at a right place, at a right time. You're simply a leader of a capable adventuring band, employed by a rich merchant. This gives a lot space for making your own story, which is great. VO gets annoying in few places, but it's passable and writing is WAY better than Fallout 3's. If you have the right skills to find hidden locations, there is also a lot of little stories hidden throughout the game.
- Each dungeon is worth exploring and aren't too long (usually 10 minutes max.)
- Trade system is easy and fun
- Overland map is great, though it has some minor flaws
- Part conversation is teh shizt, your PC no longer needs to be jack-of-all-trades and you can focus him towards the way you want him to, without loosing any content. Also, lots of skill, class, atribute, and sometimes race or faith checks customize the dialouge, so a intimidating warlock speaks diffrently than a well-manered bard. Also, cohorts have lots of personal dialogue options (which aren't neccessary to choose, so you won't get into trouble 'cause of them), so they aren't mute clones.
- Gameplay is kept on low level, without powerful artifacts littering the dungeons and shops. To get a decent equipment you have to work a *lot*, no longer will you have dillemas like "is the +10 fire scythe of destruction better than the dual kukri of silent death?" all the time. There are lots of opportunities to spend gold, so most likely you won't be running with 500k of gold coins like in OC and MotB. Also, lots of shops can offer no more than 1000 coins per item, so no quick getting rich.
- You get to see places and people from the OC and some loose ends are tied.
Overall, as an expansion it gets a 9\10 from me. If the original campaign looked more like this, without the epic story of saving the world, it would be a whole lot better game. Is it worth to buy the basic NWN2 for it? I've seen cheap bundle packs with NWN2, MotB and SoZ, so it may be worth to ponny up some cash. If you alredy have NWN2, it's definetly worth to buy.
*EDIT* Oh man, I gotta take 1 from that 9\10 because of the bugs. The game needs serious patching, so if you plan on buying it anytime soon, wait for a proper patch.