Well directed with excellent interviews and footage. I found it amazing how good the interviewed witnesses looked, some 55 years later. All witnesses had photos of themselves from the era.
Only problem is, there are maybe two episodes missing. Episode three ends with the Nazis surrendering at Stalingrad in February 1943. Episode four begins in June of 1944. What happened during those 16 intervening months ?? No mention of Kursk. No discussion of how the Russians clawed there way 1000 miles to the border of Germany. Episode four is mostly wrap up and discussion of war crimes and aftermath, very little detail on the military campaign.