That hub arrived today, I ordered the grey one and it's a nice looking bit of kit. I plugged it into my LG V20 and it recognised the USB hub (I was able to connect a keyboard) and the network (came up as eth0), so that's rather good, I didn't get to test the memory card reader.
I'm very pleased with it for the price, BUT, one downside, there's no indicator LEDs on the network socket, so you can't tell if you have a link or network activity just by looking.
Also, as someone pointed out on the Facebook page, there's no USB-C power input so you can't charge the G whilst using this; I suspect to get that you'll also end up with the useless HDMI feature too.