It’s very, very well done. It helps me to better understand my parents and their generation. It has a lot of combat footage, much of not shown to the U.S. public during World War II. There are some astounding statistics in this series. (I’ve watched 3 of the 7 segments, each running about 2 hrs.)
It’s gotten a 9.1 out of 10 on IMDB:
http://www.imdb.com/title/tt0996994/
which is the highest rating I think I’ve ever seen there.