Midgley is the kind of philosopher we don't see often enough these days: equal parts creative, subtle, philosophically interesting, non-dogmatic, and readable by a general educated audience rather than merely specialists of some philosophical subfield.
This book would merit high ratings for the brilliant concept of philosophical plumbing alone, but Midgley's essays on utopianism, social atomism, feminism, anthropocentrism, personhood, consciousness, and creativity are also worth careful consideration. One of my favorite things about these essays is the Midgley is often content to clarify the problems involved rather than offering a dogmatic solution, which to my mind is the greater value of philosophy. She also makes frequent interesting use of popular culture, including science fiction, to make her points rather than using popular culture allusions as mere window dressing.
My only criticism is that sometimes Midgley doesn't spend enough time delving into a topic (which might bother specialists) and at other times she lingers too long (which might bother a general audience).
But nonetheless I can't recommend this book enough for both professional philosophers and for anybody with philosophical interests, which, if Midgley is right, ought to be everybody!