I binged the first five segments last night, and found it highly entertaining and well done.
At age 64, having followed the team since 1970, I remember the recounted events very well from a fan's perspective. That said, I enjoyed the recollections and previously unheard (at least by me) "inside stories" from a variety of commentators in the greater Cowboys universe.
My three sons, avid Cowboys fans born between 1994-1996, are really into the series as well, catching up on a lot of history they weren't around to experience firsthand, and sparking some fun conversation among the four of us.