Yeah, it was nice how much detail they went into about pre-1961 Vietnam, although I thought that they could have done a better job with some of the context, specifically that the French colonial re-establishment was supported by the British, who wanted to protect their own colonial position (and which was very important in their dealings with Dewey, which otherwise sounded somewhat arbitrary). As well as the fact that the US never signed the Geneva Accords in 1954 and thus was technically not a party to the election agreement, which is relevant to the immediate post-Geneva solution, which the US was planning for the long term, not two years.
These are not quite nitpicks, but probably not enough to change the overall effect. I thought it was a good synopsis for what it was, which was weighted toward the American perspective. I completely agree with @Miguk’s comment that it was a bit naïve about the postwar situation. I am glad they mentioned the purges and executions on the Communist side. I don’t think it is a spoiler to say they will return to the Communist reaction in depth.
Btw the guy they interview at the beginning, Bảo Ninh, wrote the outstanding novel, The Sorrow of War. If you’re interested in the war, you should read it. It isn’t too long, either. I think he will be interviewed throughout the series, if what I saw in the preview I saw is indicative.
Anyway, I’m pretty pleased with the first episode. I’m going to watch it daily as long as I can. I’ve already purchased the Blu-ray but it hasn’t arrived yet.