It’s interesting seeing the comment of the person that “skimmed through the book” as a 1-star comment. I don’t believe someone can adequately review a product/book that they have not gone through.
Towards that end, this is a good tool to use. The reality is that couples don’t pray together as much as perhaps they’d want to or could/should/would (pick one).
This is a resource. That’s all it is. Is it the best-written book? Perhaps not. Is it your favorite style? Perhaps not. But in the end, it’s a good road-map for couples to do what is essential… have a together-prayer-life.
Give it a non-biased try. Go through it… not just skimming. It’s prayer. Are you really going to be disappointed that you prayed more?