The practitioner I went to was specifically certified in Core Transformation, not just NLP

I wouldn't be surprised if they use the same training approach, though I don't have any personal knowledge of that.

The one thing that's most important to know as a helper-of-people with these techniques is how to not be stopped by anything, but few trainers actually teach that. More commonly, the training doesn't even ask people to "write seven inches on how to go on when all hope is lost" (per HP:MoR), let alone practice doing it.