This could have been an interesting box-set, and I was really looking forward to watching it. Unfortunately, the producers have done a couple of things so horribly wrong.
Sound: Tacky music plays almost all the time and is way too loud so the narrator's voice at times drowns. When the music doesn't play, they have put on their "generic war sounds" with machine guns and artillery, which also is too loud and drowns the narrator's voice. They should have cut out a lot of the music and a lot of the added sounds, or at least cranked down the volume so you could hear the narrator.
The narration is generally good, when you can hear it.
Graphics: The graphical maps are almost totally meaningless. There are basically no city names, no borders, and very little useful information on them. E.g. a map out of somewhere in Turkey, I don't know where, because the small portion of the map didn't contain any well know city names, borders or anything else. And they didn't "zoom in" from an enitre map of Europe, so that you could see where this portion of land actually was. And then they put on some random explosions on the map, just to make it appear that something is happening, somewhere. Not good, seems like these maps are just something they've put in there to fill the time.
Archive film material: Is ok for its use. A lot of the clips are repeated, and when I've seen the same clip like five times in one episode I kind of think they should have dug deeper in the film archives. But this is a minor problem, in my opinion.
Contents: The contents are the reason I'm giving this two stars instead of just one. The series tells the story chronologically from the events leading to war, and follows the war through the various events. Of course at times a bit shallow, but this has to be expected when trying to fit the entire WWI onto six hours.
I also like the three discs discussing the technology used in the war.
The contents is just what I was looking for, and is in my opinion perfectly good. What a shame then, that the producers have ruined the entire experience by making the fatal mistakes mentioned. Had the sound been good, I could easily have overlooked most of the other flaws. But when the problems just seem to stack up - the sound, the music, the repeated clips and the graphical maps - everything's just annoying.