Tons of things to think about and incorporate. I love their honesty in that they were upfront about expressive writing not being a one-size-fits-all approach. It may read as dubious to someone wanting conclusive scientific efficacy, though, because they frequently underline that the results of studies can be mixed bags or have used limited measures, though maybe that is more in line with science's philosophy of "We strive to be relentless in finding ways we can be disproven, or ways which point to the insufficiency of our findings so we may continue testing."

It's better than a lot of self-help books which have this aura of selling you the magical solution to your problems, for every single individual who reads them, though this is, by no means, a purely self-help book; it has some self-help elements, but also emphasizes that they are concerned mainly with scientific studies which may simply support certain practices like expressive writing explicitly done in productive or beneficial ways, which they explain by the end of the book.

They do include a lot of warnings about certain kinds of writing which may be more harmful than helpful, which is much appreciated, because yes, you can become very self-absorbed and increasingly ruminative if you adopt a certain attitude or method of writing. On the other hand, it may lead you to important realizations and paths to solutions to problems you are struggling with. It's also great that they acknowledge how trauma affects everyone differently, and the various time intervals in which they may write about the trauma may or may not be helpful depending on the individual. I am skeptical in one of their assertions that some people have not experienced a single trauma in their lives, though--it's more probable that they simply have coped with it better or not been affected as much by it, which they also state. It also depends on your definition of trauma--theirs is very broad, however, so certainly, everyone has experienced some kind of trauma.

Definitely a helpful kind-of-sort-of self-help book, but if you're looking for tons of strategies and exercises, it's not really the best one for those. I'd say it's a good starting point, though, or if you want evidence-based confirmation that expressive writing can help, if you're that type of person (which I am, I guess! Obviously).