Discovery Atlas: has anyone seen any of these?

I am considering buying China and Australia, and wondered how good they were as well as the HD quality.

I haven't bought them, but Hi Def Digest gave them a 4/5 PQ and 3/4 AQ score. I've been thinking about buying the Australia disc myself, you might want to read the review on that site, also I remember there were some compatibility issues, but this was at the beginning of last year, so the firmware updates may have solved them.

Can't speak for the disc version but I watched the Australia episode on Discovery HD and it was excellent!!!