It is very well-studied in psychology. To say that most academic researchers don't "endorse" it is silly— it's not the job of a researcher to endorse a particular survey instrument, but rather to dispassionately study the mind using the best instruments available. That said, the Big-5 personality scale is certainly a more standard survey instrument in psychology, and it really doesn't matter too much which survey instrument you use, because they all correlate together. They just differ upon where you draw the coordinate axes in the space of personality; but they're all measuring essentially the same space of personality.
It is very well-studied in psychology. To say that most academic researchers don't "endorse" it is silly— it's not the job of a researcher to endorse a particular survey instrument, but rather to dispassionately study the mind using the best instruments available. That said, the Big-5 personality scale is certainly a more standard survey instrument in psychology, and it really doesn't matter too much which survey instrument you use, because they all correlate together. They just differ upon where you draw the coordinate axes in the space of personality; but they're all measuring essentially the same space of personality.