Very late to the party, but I've finally got my copy of IWD+HoW and trying out this mod!! So far, I'm LOVING it. It's closest thing that ever got to BG2
I had to restart the game once because I realised that I have no mage in the group! (My PC is a Cleric). I've re-installed the mod to change Severn to Mage, Teri to Thief/Mage and Korin to Cleric/Ranger. This way, I have 2.5 heals and 2 mages
So far, dialogues were FANTASTIC!!! All of characters come across very interesting, their dialogues are not overly dramatised and fitting to situation. I love how they interact among themselves and the town folks rather than just concentrating on my PC. At the moment, I'm getting quite interested in Nella, Korin and Holvir. I just got to Kuldahar, and got really interested in Korin's story.
I think the only thing that is bugging me is how laggy the game is. I don't know whether it is due to mod or due to limitation of the combat, the whole game is quite laggy, not just the conversation. I'm ok with waiting a minute or two for party members to fire up the conversation but am sometimes worried I may be missing out on a conversation. For example, after I got to Kuldahar, Severn and Holvir had a conversation about the avalanche (how he Severn's lost his flute while Holvir's got injured a bit) - unless this conversation is meant to happen in Kuldahar, I got a feeling the whole thing was really delayed as I had to get through the path between avalanche and Kuldahar.
But all in all, I can't wait to go home after work and play IWD again!