Tests aren't validated by anecdotes of how well the results appear to match individuals. It requires large samples and proper controls. The fact that you believe it is useful indicates how successfully it has been marketed.
When my job involved the purchase or contracting of various tests, I rejected any marketing that was supported by testimonials. I wanted to see the actual validation studies.
Tests like this do make for interesting discussions as in group meetings, but the problem arises when they are given too much credence and are used for such purposes as making hiring decisions.
Stupidity has its way, while its cousin, evil, runs rampant.
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