The program is interesting, informative and well done -- at least the 2D version. The 3D version of the program although it is exactly the same as the 2D version was a disappointment because of the old technology used to create the three dimensional effects. I had expected that from National Geographic the 3D version would have been done using Real 3D which is now the standard used in the cinemas and requiring polarized glasses to view or a near equivalent. Instead, the three dimensional effects are created by using the old red and blue technology which was probably old even in the 50's. The glasses (four pairs of them) are so small that they barely fit a child's face and if you are an adult who also wears glasses then forget it. It was also disconcerting to see things such as cloud clusters that were red on one side and blue on the other. This was probably because the 3D process was not used consistently throughout.
If this DVD is ever reissued in a more modern 3D format, then I would consider buying another copy but for now I would recommend that you purchase the 2D only version which is also available and for a great deal less.