I've read three of his books, and although not all are "great", there's always some interesting thoughts about what he shares. I also like that he really gets people to develop a sense to actually think and work deeply, and move away from shallow and unsatisfactory busyness.
His newsletter and now his podcast are excellent ways for people to ask questions and get suggestions and help for free.
He has a bit of a big ego, but I wouldn't use that to call him "another BS self-help sales person".