Just read this over, many major topics of the book aren't addressed here such as improved memory & brain function, improved reaction time, reduction of Alzheimer's(by sleep flushing the brain of certain toxins consistently linked to Alz), importance of sleep cycle timing(deep REM sleep vs lighter REM sleep, etc), and possible links to Autism.
I also noticed a response to a question on memory from the article's author saying something like "well I didn't look into the impacts on memory so I can't comment on that". Also, this reads as a hit piece in general involving significantly less research and details involved, so I'd take it with a grain of salt.
On the other hand, it shouldn't be so easy to find evidence of the author taking creative liberty with data. If he is willing to change data in one place to fit his narrative, then you ought to take the whole book with a mountain of salt, unless you have the time to investigate every claim yourself.
I would be more concerned with the major topics that _are_ addressed by a piece of criticism than the ones that aren't. If you want to discredit a piece of criticism, you should address the actual contentions.
Of course many topics of the book aren’t covered, this entire post is only about chapter one! If you actually read the post you will see it is pretty damning.
