Works perfectly recording at DNxHD 220 x highest bit rate and color depth 10 bit no dropped frames. Black Magic recommends 64gig although there are higher capacity cards. Make sure the read write speed is always 300mb 2000x. You will be able to record about 15 min at highest quality refer to the BM website for alternative recording times. Format the card according to your file format ExFat for Windows before using with the device or Camera.
All other recording options and HD also work just fine no problems.
People may be aware that Lexar is closing down but not due to poor cards but rather losing business and investing in other areas of the company.