I was very skeptical of the PI, it's premise, and deliverables. A few weeks into an executive training, I found very valuable tangible and applicable skills for communicating more effectively with my coworkers. The premise I still find a bit tenuous, however, they understand communciation and have taught me how to work with people in their native communication schemes which has been invaluable.

The vendor is good, but not amazing. They know their product, but forget the client doesn't, so you have to ask the right questions. But they are very responsive.