Apparently that above reviewer never actually played Baldur’s Gate. This is an amazing and lovingly restored and reconstructed chapter between BG1 and Shadows of Amn, the story is full of a lot of foreshadowing for the next game, without any spoilers, the item management and navigation is well executed for touch displays and much better than the original or even the computer enhanced edition with the one exception of item description which is a long press, something that can take a second to master, but not that long. Like any real rpg the game is what you decide it will be. So no, you don’t have to fight the big bad villain, yes you might not save a particular character, and the characters you interact with, or not, are up to you.
That being said, he new and returning character were perfectly rendered with what sounds like original voices! The banter and jokes are perfect and the new characters, especially Glint, are some of the best of the entire series.
This is an extension to BG1 (the chapter numbers even continue), this is an interlude before the BG2, this is not an expansive involved epic. Right there in the description it says 25 hours, I sunk at least 100 into BG2. However siege of Dragonspear is EXCELLENT. Any Bioware fan will love it, and any BG fan must play it!