Questions about Christopher West's Work

So I am interested in reading more about the Theology of the Body.  Naturally, one can't do an internet search on that topic these days without the first twenty results all being about Christopher West.  Yet, my personal experience has been that whenever I mention his name to serious, faithful Catholics with degrees in moral theology, they tend to cringe.  At best, though, all you can drag out of them as an explanation of the basis for their reaction is this:  "Theology of the Body isn't all about sex."  So, hoping that my few remaining readers can engage in some thoughtful and respectful critique of this popular author and speaker, can someone identify for me the core concerns people have with Christopher West's popularization of the Theology of the Body?  Please leave your comments below and abide my request to be respectful.  I'm also not looking for any criticism that revolves around his style of writing, personality, popularity, etc.  In other words, tell me if there is a substantive concern about the theology he is teaching.