3.5 - I listened to the audio, and while I learn better this way, this is a book where having a copy on hand will be most helpful. My rating in more for the fact that I don't love books with so many examples, even if those are useful to the reader, as an audio it starts to become background sounds because it felt like there were too many to focus. This said, a print copy of the book will be helpful for those with this condition, as it appears 1 in 5 or 20% of UK & US people do deal with it. I learned that mine might be more noticeable when irritated, to the point that even my husband and son comment that my "super hearing has engaged". While they deflect that it bothers me, the book gives me ways to focus my reactions. Sadly, like with many other things, this is a "you have to find the solution that works for you" and not a "society can change for you" type of problem. Nice to know others are dealing with this, but sad that most won't tell you because society will just try to talk you out of believing it is an issue.