Entertaining, if slightly far-fetched at times. I feel like Netflix's involvement like this made it needlessly watered down from the intentions of the novel that I believe it is based on.
1) Why does every character speak in English, have the Germans speaking German and the French speaking French. Subtitles are fine. When Germans met French people there likely were translation issues and frustrations, why not have this in the show? Having everyone speaking English makes no sense.
2) The continual reference to the "Americans" coming, this is likely because the show is made for an American audience, but they would have more likely called us "Le alies" or something along those lines, because the French knew it wasn't just Americans but also Canadians and British coming.
3) There is also some historical demographic and military errors but I'm willing to let this pass as it's made for a general audience.
Overall, entertaining, but slightly strange portrayal of a novel.