I thought it was fascinating, especially about the nicotine absorption of e-liquid as opposed to cigarettes and the amount of time it takes for nicotine to enter the bloodstream when vaping vs, smoking. I also thought it was interesting that the cardiologist and his world colleagues toted nicotine replacement products, such as the patch, as completely ineffectual--a veritable failure--and how the United States seems to be the few, if not the only, holdout as far as that is concerned. I'm glad I never went down that road. He also debunked the theory that e-cigarettes contain carcinogens. He was quite dismissive on that score. Goodness, there was so much information. I truly recommend you sit through every last minute.