The device works, but only for a random Rumber of boots. Suddenly, the card reader is dead and only the USB 3.0 ports work. Then, I have to disconnect the internal USB 3.0 cable, boat, reconnect the cable, reboot - and then it works again. This Seems to be the case when used on Certain ASUS system boards.
The problem is a real nuisance, no real solution is available. So I bought on external Transcend USB 3.0 card reader ... Actually I should complain and get a refund.