This was my first book on EI
It does not really take a scientific approach backed up by research or evidence but uses more logical ideas, instead, and makes them feel like common sense because of the way they are phrased.
Some of the ideas are a bit repetitive, but they are introduced from different perspectives, which, in my opinion, mostly makes them stick with you better.
It did help me a lot realize some things about my thought process and work on improving them, as it offers some direct approaches to solving your Emotional problems.
Some ideas were not that clear, for me at least, as the way they were applied in the book seemed a bit too specific to certain emotional problems, mainly ones concerning anger, frustration, or depression because of certain events that occur to us, but it does not talk about emotions that are not directly related to a certain event, like being depressed because of a magnitude of different reason rather than a specific reason.