I have one of these and it works with Note 10.1 2014 - to some degree.
Basically HDMI and USB work - at the same time.
I can connect my tablet to external screen and use USB mouse, keyboard and flash drive (through USB Hub) all at the same time.
But... USB connection is kinda unstable - devices disconnect occasionally and then reconnect.
Also, charging doesn't work at all.
On my Note2 everything works OK - I guess Samsung changed something either on connector or in software in Note 10...