Discord seems a difficult character to capture, but Berrow did a great job at nailing his character, and this book was quite fun. I loved seeing this side of Discord, where he's asked to do something outside of his comfort zone, but he does it in an engaging way, rather than just sulking or throwing a tantrum. In some ways it seems a little odd he wouldn't try harder to be the center of attention, but the further I got into the book, the less that bothered me.
The ending seemed a little odd, as Discord has only ever seemed to care about himself, but it's also kind of cute, so I don't think I actually mind it. Trying to stay vague, to avoid spoilers.
Overall, while a few bits of this book felt odd at first, I ended up enjoying it, and I love how well Berrow was able to capture the character of Discord. I also loved the various small nods to what has happened in the show, as it shows Berrow knows the source material well.