I barely know who Jung is, and Myers Briggs test is nothing more than a tool for mid level management to use to divide and conquer their workforce.
That is the biggest problem with the MBTI. It's a dumbed-down way to interpret Jung's ideas. Some of Jung's ideas seem insightful and interesting but they are hard to translate into measurable scales. In the hands of corporate managers, such tools are akin to powertools in the hands of four-year-olds. Linking Jung's ideas to other more down-to-earth concepts in psychology is not easy because Jung's language is somewhat vague, and he holds some questionable ideas such as "synchronicity". Yet, there is something powerful to them.