Let me be very clear up front: if you didn't like NWN2 or either of the expansions you are unlikely to enjoy this. I say that first because between the three releases we have seen the introduction of a new AD&D game system with plenty of new features and a fairly interesting story (NWN2), an expansion with some of the best writing in recent years (Mask of the Betrayer) and an expansion with loads of innovative features, plenty of combat, but a fairly thin plot (Storm of Zehir). I also mention it because NWN2 has caused loads of heated discussion on both sides in just about every forum I frequent. So if you haven't found a hook, chances are it is related to the underlying system and that dislike will ruin this adventure for you.
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The side quests and party banter and little choices along the way combine with some larger choices in the main quest to make you feel in control of your destiny. Even better, the choices are not all the typical 'Take my money and I'll still do your quest / I'll do your quest for good amounts of gold / I'll kill you, take your gold and then complete the quest to get more gold' variety. There are options throughout to make use of your dialog skills, and even the non-skill choices are nuanced enough to be satisfying. You even get to choose when and how to assert yourself - there are times when you can just stand by and listen as your party decides how to proceed.
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So in terms of the final value proposition, I would rate this as a 'must have' module in spite of the activation limitations.​