Quite useful. A lot of the advice is based on recent epidemiological studies as well as twin studies. Good general guidance on amounts of milk, amounts of food, quality of food, different types of feeding techniques, how to deal with fussy or greedy babies. Some advice didn't have a study to reference though. It was somewhat repetitive in parts so I've awarded 4 stars. It has been more useful though than other books written by "influencers" or those without relevant qualifications.