I finished the book in a day; found it difficult to put the book down and stop reading. Science fiction and fantasy are my favorite genres and they really nailed a great mid point. The story line was very engaging and the world they've envisioned, including the political and demographic groups made for a great setting. Overall, I enjoyed the characters and found them fairly fleshed out. I was surprised at several points but it never felt like the authors just tossed in a random twists or hadn't fully planned out the story.
The only reason I didn't give 5 stars is because a few character story lines didn't really make it into the larger story but I am confident they'll fit into the series well and my questions will be answered.
This book is totally part of something bigger, like the story was cut in weird places. The story follows the traditional arc of story telling, but it didn't give me the clean ending I was looking for. The author explains this in his podcast about Audio manga and all that. Overall, its a totally fun story. I enjoyed it alot and joined this site just to leave a review.