Dr. Peter Lin certainly portrayed a fair overvue of what an ecig is.
However, he failed to mention that nicotine is not a carcinogen on it's own, surprising considering his occupation. Secondly, he touched on the concern that college kids are picking up the ecig habit, that it was the "cool" thing to do, but he failed to observe that those same college students are likely to pick up a cigarette if ecigs were not available. From my own experience, working as a bartender to pay my way threw university, I essentially started smoking at that age because it was "cool".
Again, fair assessment but not necessarily comprehensive.