I read/listened this book in one sitting - obviously, I didn't try out all the exercises (though I liked many of them), but I think this is one of those books that I'll refer back to over time. It's an easy read - Kat John's friendly, accessible style is, well, friendly and accessible - like having a cuppa with a good friend who loves you but isn't afraid to tell you hard truths. I enjoyed it overall and found her voice to be easy to listen to.
Having said that - it's perhaps a little simplistic. My 15 yr old son was listening to the final few chapters with me and he definitely felt that it was a bit 'cringe' (his words, not mine) in parts. He felt that she was perhaps trying a bit too hard to be funny and relevant in a space that is pretty much stuffed to capacity. He also has a healthy scepticism for the 'coaching' and 'therapy' spaces from personal experience and didn't feel that it offered anything new or particularly helpful, so it was a big 'no' from him but then he is not this books target audience.
All up, it's an easy, quick read with a few good exercises to help pull you out of your overthinking, self-critical shame spiral and put you back on the road towards understanding yourself better. I agree with my son in that it probably tries a bit hard but then, who doesn't try a bit hard when you are trying to stand out in an overcrowded market and overall, I like Kat John and I think that, whatever the books shortcomings might be, SHE is coming from a place of soft authenticity and there is a lot to like about that.