I've read it and I found it to be the most useful book on writing I've read so far, because he grounds his advice in clear linguistic principles and he is mostly not prescriptivist in his advice.
His advice about keeping an easy-to-understand sentence tree alone is worth the price of admission.
Pinker made it easy for me to slip into my own thoughts about writing, how I currently write, and how I would like to write in the future. Just for that I thought it was worth it. However Pinker has Opinions about writing rather than just suggestions. Be prepared to disagree with what he says and how he says it. I suspect he would be glad for you to do both.
https://stevenpinker.com/publications/sense-style-thinking-p...
I was thinking about reading it but it's hard to find reviews of the book that don't include praise or criticism of Pinker's other work or the author himself.