I work with CSG and we have delivered this training successfully in Portland over the past year. We have developed our own curriculum and have had possitive feedback from our students. It's a wonderful hands on experience not to mention fun with spray foam!! However, we have also expressed the need for an instruction guide on the props. They tend to be quite cumbersome. The biggest complaint is the clean up of the props. The amount of waste produced from this training and proper disposal is also concerning.