I'd do a search for experiences with komputerbay on some of the photography websites. Saying they are poorly thought of is a understatement.
The card I'm currently using is a Lexar 1000x. I did read reviews, sifted through 99% speculation... and took the risk anyway—I won't hesitate to return it if I have issues though.
Good Luck. They used to sell the cards labeled as Sandisk, but got well known for counterfeiting. Now they label those cards from China with their own name. Obviously, they work, but many do not meet spec.
Good luck, check it out well.
I have actually seen this as well. If you have seen any reviews specifically about the 64gb CF card not working, I'd be interested (I HAVE heard that the 128GB cards' speed isnt reliable). They seem to be getting good feedback for working with ML raw recording.