You can buy decent headphones DAC for £50. Fx-audio x6 used to be $30 due to popularity its about $50-60 now.
I nearly bought one of these to use between my Synology NAS and AVR as my NAS can output audio via USB when music is played through its onboard audio suite, Audio Station, but apparently it won't work without drivers and there's no way of installing rivers on my NAS so I never bought one. At this price though, it looks like a very good deal indeed.
I have one of these and the drivers on it need to be reinstalled all the time.
Maybe 5% cash back from Quidco as well.
Agreed, had mine since 2014 and it's still a great bit of kit (y)