The pictures are great. The book is short and to the point. It doesn't have a lot of frills and unnecessary filler information in it to extend the length of the book. I thought that was great.

It says it is for beginners but a lot of the terms and exercises are for intermediate level. It's a good book for someone who is moderately athletic and wants to amp up their workouts.

As a personal trainer, I'd recommend this is a tool to educate yourself on the benefits of HIIT but it is not an end all be all book.