I got provided free of test.com.de available for testing this OTG dock and find it very convenient.
I have tested it with the same USB stick, SD card, and wireless keyboard and everything worked properly. I find particularly well: the way you can replace with other data.
The processing is perfect in order if not. The Logitech keyboard dongle went in with for example some hakelig in the USB port of the docks inside.
All in all I highly recommend this OTG adapter happy to!