Overall, I enjoyed this book. There were a few minor things that I personally didn't care for.
Having lived in New Zealand the majority of my life, I enjoyed the NZ connection, and felt that the book portrayed things accurately. I also appreciated the theme of "two sides to everything" in more than one thread throughout the book. I did think the grandpa could have given more definitive advice about the bully earlier in the story, but I liked the character development in Josh (the main character) as the book progressed.
Overall, a good, enjoyable read.