I enjoyed the book. I found information that I wasn't familiar with, like the correlation between dementia and diabetes. I was also fascinated by the chapter on Alzheimer's disease. While it isn't a particularly detailed medical account, it can provide a substantial amount of information for the general reader.
I recommend this book for anyone wanting to learn more about the aging brain. It isn't the definitive work, but it provides good information for the general reader and is a good place to start. As with all scientific information, it's always good to go to other references to educate yourself about particular points.
I reviewed this book for the Amazon Vine Program: The Scientific American Healthy Aging Brain by Judith Horstman