While most people here seem to be dismissive, it's not like his books are targeted at the already successful, accomplished, or polished. They are meant to show people a way to become more successful in a world that has too many distractions. Not every job supports deep work and the other approaches, but many people, especially students, will benefit. I know I could have used it 30+ years ago!
I've only read Deep Work, but I found it very motivating and have tried to incorporate some of the lessons into my life. Now, (literally) buying into the whole ecosystem of Cal Newport is probably overkill, but occasionally listening to his podcast, which essentially answers the same questions over and over and over again, can be motivating and uplifting for those of us who are lacking in the perfection department.