The documentary is typical Ken Burns... interesting, but a little meandering at times.The real shame of this version is the grainy video that is painfully apparent on a large HD display. Burns' panned still images are crystal clear showing every blemish and fold of the old photographs but his shots of the majestic scenery in the parks are marred by his poor choice of camera and film. I will say the soundtrack is fairly well done even if Peter Coyote (narrator) is a little dry.Do not bother with the blu ray version, you will not get anything more than the standard DVD version with this series.