It would be easy to say this is the most robust gameplay report I have ever seen, but it's much more than that. It's a novel - with character developements, changing relationships and twists. Yes, sometimes it could be more polished, but we have to keep in mind that the author didn't have the luxury of knowing how it's going to end - or even how exactly it is going to get to the end! As everyone who played Ironsworn knows, the dice often surprise you and planning the story ahead is usually not a good idea, so I'm not as hard on this book as I would be if it was a "regular" novel. I also like that the author included materials related to the game side of the story - character sheets, assets and rolls. It also makes it easier for people not familiar with Ironsworn to understand what's going on.
Overall - I enjoyed reading The Unspoken Vow, the main character is a sympathetic guy, and I liked the depiction of the elven culture. A lot of effort went into this book, and it shows. I'm looking forward to more of Proklis' adventures.