I find it curious the contempt some have for MB. It is a binary partition (actually a series of 4 binary partitions) of an underlying trait that is more of a continuum. What is curious is the hostile view that if a model is not perfect, it is therefore BS. We all accept imperfect models in SOME areas to process reality. Global warning scientists cannot perfectly predict climate. Does that make they whole field complete BS? (whether it is BS or not does not hinge on perfection of prediction). Just an example, not trying to start a tangential debate.
As for me, when I first took a MB test, I was absolutely floored by how well the description of my type pegged me. My wife had the same experience and knowing each other's personality type was extremely valuable in helping us understand our differences with humor and much reduced conflict. Did either of us ever thing that our MB was going to be perfect? Of course not. There is a wide range of utility between "totally perfect predictor" and "complete BS", and almost all ability to understand and deal with reality requires us to operate between those two poles.