4/5 But it is not suppose to be Planet Earth
  by Adam (Franciscan University, Steubenville, OH USA)
It is hard to compare this set of documentaries to Planet Earth because the film makers did not intend for these films to be another or type of Planet Earth. They did not have the time or funds to create a look at the entire world that Planet Earth does and I doubt they wanted their pictures to be compared to Planet Earth. Instead we have here a classic cross section of National Geographic documentaries with superb picture and sound that should thrill any family to own. Some inclusions weaker than others, this is a great set on blu-ray for less than $10 a film.

3/5 Planet Earth is better
  by Amy S. Mcfarland (California)
This is a nice set, but not up to the standard set by Planet Earth. The imagery on Planet Earth was absolutely stunning, the best examples of 25 years of footage. The story lines on this set were OK and the imagery OK, but for National Geographic I expected more.

2/5 Decent, but not great
  by D. J. Nardi (Washington, DC)
This set is basically a rehash of prior NatGeo documentaries. I had seen some of these before, such as Relentless Enemies and Kingdom of the Blue Whale. While good, they're not great - and certainly not up to the groundbreaking standards set by Planet Earth and the folks at BBC. They tend to provide overly dramatic storylines for the animals and focus far too much on the human researchers. The fact that this is mixed with with documentaries on things ranging from astronomy and sports makes it difficult to recommend this set as a gift for anybody, except perhaps a diehard NatGeo junkie.