I have it, and I'm finding it very useful. There is info about maximum amounts of daily salt for each age group and foods to avoid, which, even if you are going down the hardcore 'they'll have whatever we have' route, is really helpful, IMO. (if DS had what DP had, he'd be starting on cheese sandwiches and egg foo yung at 6 months, which isn't really ideal).
Where I think it is very useful is that it doesn't assume the person reading it knows much about cooking. She includes a section about basic techniques and recipes, and explains terms like sifting, simmering and boiling. Unfortunately, I think that will get a slightly dismissive reaction from those who know a lot about healthy eating and regularly cook meals at home ('does she really need to explain what boiling is?' etc)
But if you think there are new parents out there keen to do their best for their DCs, who may have very few cooking skills, and who would appreciate very clear explanations to get started, then that's all to the good IMO.
There are a lot of recipes, as well, which I find useful as I have zero inspiration myself.