We have one group of people that finds it useful, and another group that doesn't find it useful at all. What are we to make of this? At the very least, it is not that it "definitely" is useful.
We have found there are different personality profiles of communicators that are more or less effective at using the tools.
Those that communicate like supervisors with a wide range of language at their disposal for approaching a problem from many directions can be more effective.
Note that none of these tools are useful for those working at the bleeding edge of human knowledge.