Low quality trainings, bad trainings — disorientate and do not live up to the expectations of their participants, can inflict mental trauma on them and reduce the reputation of professional market participants.
The quality of the training and the satisfaction of the participants in the trainings are not the same thing. Participants may enjoy poor quality training, just as high quality training may in some circumstances displease participants. See Training quality assessment
Factors affecting the quality of training
The quality of training depends on many factors. Most of them are under the control of the coach (leader), some are beyond his control and competence. See Circumstances Affecting Training Evaluation and Audience Inquiry and Training Focus
The main factor determining the quality of training is the personality and professionalism of the trainer (training leader). See Coach, trainer
Coaches rating
The Association of Personal Development Professionals conducts a rating of trainers that reflects the quality of their work.