It looks promising from what I have seen so far. I've noticed a couple of graphics glitches and I am experiencing some lagging, but in fairness this is probably more to do with my video card than anything else. In my opinion they have also made some improvements to the graphics as the landscapes are well done and contain more detail than the OC etc. (this may also be causing the lagging though).
Now the rpg element. I've only had one battle and spoken to 2 or 3 NPCs but already I can tell that they are trying to adopt more roleplay elements into the game. In one conversation alone I received both lawful points and good points and, judging from the other responses I could have chosen, I imagine I could just have easily got chaotic or evil points if I had chosen different options. Also, the dialogue seems to be well thought out and the events leading up to the start of the game have been explained pretty well by the intro movie and a couple of books that give a brief history of Daggerford and a brief history of your character.
I have only come across one henchman so far but he has various dialogue options and you can manage his inventory etc. in the same way as in HOTU.
All in all, I'm pretty impressed so far, but I am only about 15 to 30 mins into the game
Update:
I've played a bit more of the game now and it definately has more of a Baldur's Gate feel to it than the original NWN. My henchman, a thief, makes comments every so often about it being a perfect opportunity to do some thieving and things like that. My only criticism is that you can still steal from chests in full view of an NPC and not get attacked etc.
I've only explored half of the initial area of Daggerford and I've already come across numerous sidequests, some of which sound quite interesting (such as something that may involve an outbreak of vampirism). I also accidentally stumbled across a Red Wizard of Thay who killed my level 8 cleric instantly with Finger of Death
The NPCs continue to have interesting back stories and dialogue, and you can buy drinks in taverns to get rumours etc. Also, they have added sleep penalties which add to the rpg aspect - if you don't rest at least once every 36 hours you get penalties to your stats. You also cannot just rest anywhere (such as in the streets), which is quite good too.
The problems with lagging were easily fixed - I just turned off shadows and the grass effects and all problems stopped. The scenary is well thought out and Daggerford looks like a typical BG style settlement.
The main story seems interesting, although I am barely into it. Again, it just gives the impression that a lot of time, thought and effort has gone into the development of this module.
Update 2:
One thing that has really stood out for me is just how non-linear this module is. At the start its very linear as you have to follow the main quest for a little while. But once you are able to leave Daggerford you can pretty much go wherever you please. The map system works similarly to that of Baldur's Gate in that you have to leave an area in a certain direction to unlock the area next to it.
Also, concerning the side quests, these seem to be quite varied. There are side quests ranging from finding a lost boy who went treasure hunting, negotiating with wild elves, raiding tombs and caves for legendary treasure and artifacts, attending birthday parties, helping farmers with bandits, stopping an outbreak of vampirism and so on.
The two henchman I have come across so far have nice background tales that advance whenever you level up, and they are pretty good in fight situations. They also come with some quite nice personal armour and weapons.
The main quest is the usual kind of thing but involves everything from investigative work to defeating mages and agents in battle before they can put their plans into action. I'm only in the early stages of the main quest but its already involved a variety of tasks.
The combat itself seems to be well balanced. I am playing it on the Very Difficult setting and have found quite a few encounters quite challenging for my Dwarven Cleric and her two henchman, quite often resulting in having to change my strategy in order to defeat the enemies. The enemies are quite varied too, which is always nice in a game.
Another refreshing thing is your starting character. You start at level 8 so you have access to a range of feats, skills and spells etc. so the early battles are not really tedius for a spellcaster unlike when you start as a level 1 spellcaster. Also, you are not some legendary hero, or hero in training. You are simply a mercenary who gets involved in events by simply being in the right place at the right time. This makes a nice change from the character backgrounds you have in the OC, SOU and HOTU.
The weapons and armour you find and can buy are quite well balanced. You are never really too short of cash to buy equipment, but at the same time you still have to decide what to buy as you are not rolling in money. The weapon and armour making is well thought out too. Rather than just going to the smithy with diamonds and all sorts of ingredients, you actually have to find legendary artifacts scattered throughout the land. You then take these back to the smith who will repair them and make them into powerful weapons/armour etc. This is very similar to the weapon crafting etc. in Baldur's Gate 2: Shadows of Amn.
Now for another complaint I have. So far I have not really noticed multiple ways of completing quests. As mentioned earlier, the quests appear to be quite varied but they seem to have a set way of completing them. This may not be true for all quests though as I have only done a relatively small number of them.
Another thing I am not too happy about is the experience gained. I seem to have been playing for about 3 hours or so and my character is only just at level 9, after starting at level 8. This may change now I have left Daggerford, but I have noticed that in many of the little tasks I had to complete in order to leave Daggerford I was hardly rewarded any experience, if any at all. The module does not appear to be focussed on non-stop combat, in fact I've had realtively few combat situations, so I feel like they could have rewarded more XP for the non-combat tasks and quests than they have done. 3 hours seems like a long time to just level up the once, especially as the character development is one of my favourite things about rpgs.
Despite this however, I am really enjoying playing this module and its pretty addictive as I keep wanting to go back to playing it
If you enjoyed both the Baldur's Gate series and NWN and its expansions then I'd definately recommend giving this a go as it is like a cross between the two games, and it has linked the two games together (there are quite a few references to events that took place in both NWN and Baldur's Gate 1 & 2, whether in books you find or through dialogue with NPCs). Lastly, for those that have not heard about this module, it was originally developed as a Premium Module to be released by Bioware but in the end they decided to release it free of charge. To me it doesn't feel like just another module but more like another expansion as there are several improvements made to the game, one of which being the BG style world map system.
Update 3:
The side quests are quite buggy at times. Nothing major, just little things like an NPC not recognising when you have finished a quest. From reading the main NWN forums, the module developers are working on fixing all the little bugs that people have found. The main quest appears to be bug free from what I can gather and you can still do the side quests, just not be able to report back that you have finished some of them afterwards.