Ann thinks about infant psychology, and believes that everything we do has an impact on our babies. She talked about how even tiny babies can perceive and understand an awful lot.
She approached the whole thing from the childs' perspective.
The other consultants I worked with (and I am embarrassed to say there were a few!) just gave me a set of rules to implement. Sleep training was something a parent "did to" their child.
And for me that was always impossible because I felt so anxious about the impact of the crying.
Unlike any of the other consultants Ann talked about the emotional well being of my baby, and I really felt I could trust her, which meant I trusted the process. And it felt like DS and I genuinely worked together, it wasn't something I just inflicted on him.
However if you are more pragmatic person who is slightly less neurotic anxious, a traditional approach might be fine.