Well, just wanted to update you guys on my KomputerBay 64GB 1000x
I ordered it May 20th, and it worked pretty well, I got some decent speeds, but it was somewhat inconsistent (on some occasions, I'd get a dropped frame here and there when recording RAW 1920x1080 24fps)
But about 3 days ago, my card just completely failed on me while I was shooting at the aquarium, just shooting normal pictures. Didn't even have a SD card in, let alone Magic Lantern. It was working perfectly throughout the day, then just randomly when I went to take a picture, it said my card couldn't be read and it had to be formatted. I've tried 13 different recovery programs to try to recover my pictures from the weekend, but sadly it's not readable by anything.
I purchased it off eBay, and I just contacted them regarding their warranty and see if I can get a replacement.