I just watched this and I'm very surprised. Moore finally seems to have learned that he's not the star of his documentaries, the subjects are. I still think Moore is a socialist weasel, but his arguments against our health care system are very strong and the arguments for other systems are equally as strong. He completely ignored the lack of political freedom in Cuba, IMO recognizing it in the interest of full disclosure wouldn't have hurt the film at all. F911 did nothing but make my blood boil, but this film makes a lot of good points.
I enjoyed learning a bit about how things are done in the UK and France, but I suspect the Canadian/Cuban portions of the film omit some negatives about those systems.
I definitely enjoyed the movie and it changed some of my opinions, but I think the arguments against the US system are agreed upon by the majority of Americans. The highlight here, IMO, is definitely that Moore decided to STFU and be a true documentary film maker instead of a patronizing asshat.