As many have commented before on other movies in this series, the information and footage isn't new. I have almost the entire series of tank movies. These DVD's are mostly (I stress mostly!) accurate. The footage isn't the greatest and the narrator might put you to sleep - sometimes he sounds like he is falling asleep himself, and often they reuse the same footage more than once in the movie.
But, if you love WW2 German tanks and planes, it's worth checking out the whole series. If you're a hardcore tank fan like I am, you might be a little disappointed.
But, the price is reasonable, and you might still learn something new.