Snap judgements are surprisingly accurate. Even the ones we make without knowing how. Even the ones we make when we don’t even know we are doing it: “I just had a bad feeling about him, I can’t explain it”. This book gives evidence and explanations for this. It’s interesting in itself, but the trouble is it has been a very influential book — since it was published, its examples have been cited and reused so many times in so many places that what must once have been groundbreaking now seems overly familiar. I had similar thoughts the last time I saw a performance of Hamlet: the dialogue just seemed to be one cliche after another. Of course, they weren’t cliches when Shakespeare wrote the play!
Even so, the sections towards the end about microexpressions were very interesting and new, at least to me. They give some insight into where the “bad feelings” about people might come from, and maybe some pointers into how you could train yourself to read people and situations better. So even now this is still a worthwhile read from a very influential writer.