I am still watching it.
Way better than I expected. What I expected was some degree of obvious Anglo/American propaganda, so far, I have not seen any of that. The equipment in use is pretty accurate, except for one seen on the beach during preparation for the invasion, there was a US military trailer that came about during Korea, however only part of it was visible and it is likely it was first used during WWII. (The US military tends to get attached to styles, for example, my dad who served in the earlier 90's was issued boots that were the same style of those worn by my great uncle while in the Korean War as an Airman.) Also, both sides were known to utilize captured gear, mainly vehicles and vehicle accessories.
There is also a scene in which the headlights are causing a reflection on the camera lens. other than the accuracy of timelines, battles, gear, and personnel is good! And, the use of actual German actors is great! As an American, seeing Adolph portrayed as something other than a raven lunatic is kind of weird, though seeing him as more normal lends credibility to the storyline, though I think he's portrayed as too quick agree with his JCOS (I know, that is not the acronym for it in Deutsch) though portraying him as an artist is correct, as is the mule-headed man he was (Germans, mule Headed?! what a shocker) So are us Poles. Anyway, I think it is an excellent, though slightly simplified movie! And again, I am not quite done watching it.