I think it's still worthwhile. I first read it as a teenager, not long after it was published. It had a big impact, and I feel that since I read it, I've seen a lot in the culture that has referred to it, taken it for granted, regurgitated it, addressed individual topics from it, etc., but I'm not aware of anything that has replaced it as an overall introduction to the concept, which I think is due to quality of the writing. Even as a teenager I found easy and engaging.

The book Emotional Intelligence 2.0 is a different book by a different author. Read the Daniel Goleman book instead, or at least first.