I liked the original Carl Sagan series when it debuted on PBS in the late 70s. I've even watched it since then, though some of the science in the show is dated. The show has not aged well for me. I can only take Carl Sagan in small doses any more. I don't know why I've changed so. Don't get me wrong, I admire how Dr. Sagan brought science to the masses. I have his novel Contact and several of his science books.
Anyhow, I won't be watching this new show, so maybe someone can post a review here and if the series is any good I'll see about purchasing the DVDs some time down the line.