The background information of what lactose intolerance is, and what problems it causes was very well researched and explained. However the biggest problem with this book is that it is not intended for the UK market as brands given are mostly not available here.
Basically, if you have been lactose intolerant for many years and know which products are a substitute for milk based items, then you could make use of this book. If you are new to lactose intolerance then I would suggest you steer clear until you are confident of finding UK equivalent products.
The only other drawback is that all measurements are given as US (I appreciate that US editions would!), so just bear in mind that "cups" are the units of the day and not grams or ounces!
If there was a UK version with as much detail as the US version, I would buy it without hestitation