I've read this at least once before, I'm pretty sure twice before. It's likely to stay in my collection despite not really liking much of what it has to say. As my mum said opening it randomly, "It looks like a lot of psychobable." I could give more specific criticism, but one thing I felt bothered me a lot about it is that it probably tended to be rather "cis-het" in ways that kind of are offputting. It expends beyond that, but it kind of ends up being rather conservative in terms of social constructs, and also rather prescriptive in a lot of ways.