Ninety days of training, feeding, sleep and socialization built around your breed and your home — with the emergency signs spelled out rather than buried.
Feeding, toileting, sleep, biting, when to socialize, what's normal. You find out by getting it wrong, usually at two in the morning.
Crate or no crate, this food or that one, wait for vaccinations or don't. Half of it is decades out of date and some of it is actively harmful.
Much earlier than most owners realise, and it doesn't wait for the vaccination course to finish. Miss it and you're managing fear for years.
Worth it for serious problems. For the ordinary first ninety days, what you mostly need is knowing what to do and when.