I had 100 gigs of prized photos on a Lexar 128 gb 2.0 card (UDMA7) to offload onto my Mac Pro. Using my old Sandisk card reader, a few hundred of the same photos were missing from the download, both to my Mac Pro as well as my Macbook Pro.  But if I viewed the card in my camera, all of the missing photos displayed perfectly. Frustrating.!!
This reader not only offloaded the photos FAST, ---all of the missing files were gloriously included.
For any Professional CF card, this reader is what you need.