We did something similar to this at work. What I found useful wasn't so much how it classified me (probably equivalent to an ISTJ - no surprise there), but the ancillary information about how to deal with other types of people.

After everyone was classified (and the results published within the team), it gave advice on how one type of person could modify their communication style when communicating with another type; how differences in personalities and styles could lead to misunderstandings, allowing everyone to be on the lookout for these.