(audiobook version) quick and light, very accessible. it was ok, except some odd ideas here and there like: too much happiness at work is not good because you start acting "risky" - this, for example, was absurd, and contradictory with the actual theme of the Emotional Intelligence book series - are you supposed to be "happy" or what?
...but this is about business happiness, and you also get chapters talking about customer happiness, something to note.
otherwise, the ideas are good, for example:
people are happy when the personal vision for the future, or their future, is aligned with the company's vision,
when they do not feel capped in their growth and the future is open to expansion,
when they can focus on things that are important to them, in parallel, or as part of the work towards the business goals,
when they can form connections at work and build, or become part of a community, to fill personal needs
...
now, conceptually speaking, i do disagree with other things from the book, for example the concept that happiness is not high intensity feel-good moments here and there, but consistent low-intensity feel-good moments that have highly recurrent pattern - i do not think this fits everyone the same way, my opinion is that for some, the latter can actually cause boredom, and/or depression in time. there are some that take more lasting pleasure from the comprehension of the delta between normal-life-moment levels and happy-moment levels, and that can be sustainable for them. we do not all fit the same patterns, some have more patience than others, some are more appreciative than others, just these two things can change perception of happiness considerably, for example.
then there is the discussion about making mistakes, as in do not tell people the made mistakes publicly, but i think the bigger problem is the culture around making mistakes, maybe a mistake was made, but that is some both the employee and the business can accept and work to improve, and nobody is looking at it as passing judgement.
then there is a discussion than can be had about values around statements about happiness from the book, like "you can be happy by being altruistic". one person can be altruistic because it makes them look good (technically _act_ altruistic, not _be_ altruistic, but sometimes the difference is subtile to the person themselves), they look good to themselves and/or others, so they are happy, while another person can be altruistic because it's the right thing to be, this is what normal looks like to them, this does not add to their happiness, it's neutral, but not being altruistic would make them sad.
...but, yes, book, tell people being altruistic will make them happy, it's gonna be beneficial to the world :) win!