Greetings,
I have owned the TEAC NT-505 for about a month now. I bought it specifically to use as a RAAT enabled Roon endpoint.
It was an expensive purchase (for me), but integrates seamlessly with the Roon core, and sounds really great, so I anticipate years of enjoyment out of the device.
Note that I had to make two updates to the unit to enable Roon integration: First, a firmware update via USB stick to the streamer itself, and second a software update via the TEAC ‘HR Streamer’ iPhone app. It was after the second update that “TEAC NT-505” appeared in the Controller app.
This is my first post to the Roon community, so hope that helps! 
S.