I'm actually relatively new to Ajayi, only having recently read her stuff on social media. I came across a fantastic thread and the points she made in it and thought one way to support her work was to read this since it was (luckily) readily available from my local library. Great!
I can't say I was too excited or interested. There are parts that had me nodding my head, agreeing with her writing, etc. If you enjoy chatting about everyday life, feel some catharsis at an author calling out people (in the vein of "that friend" who takes up your time and never returns the favor for example), then this might be a good book for you.
But I agree with what others say: there's nothing that's new, nothing insightful. It's not unlike a conversation you might have with friends or co-workers but this sort of thing works better (in my opinion) over drinks or when just shooting the breeze. Some of the sections are far too long and become too "chatty."
But as I said, I wanted to support the author in some way as well as by increasing my library's circulation numbers (even if only by a little bit!). I'll still follow her work and on Twitter but I wouldn't recommend this book unless you can borrow it or REALLY love her writing.