I think most of what he says is common sense, and it's largely how I parented dd. I just followed my instincts, I guess. Never left her to cry, fed on demand, never did punishments like time out or naughty step, co-slept for as long as she needed to etc. I did often feel that I was swimming against the tide tbh, and often had to ignore the advice from my health visitor/well meaning friends about making a rod for my own back. She's now 15, and it may be a coincidence, but she is an absolute delight, and we have an incredibly good relationship - much stronger than the relationships that many of her peers have with their parents.
Would that have been the same if I had parented differently in those early years? Well, obviously, I'll never know, but I definitely don't have any regrets about how I approached it.