probably the best streamer out there. Paul has it right, USB is the worst, I2S is the best, then Ethernet, but most people don't want to spend the money for a good dac with these inputs, they will be a cheap dac with usb and then spend hundreds if not thousands of $$$ trying to make USB work.
I would take this streamer over an Aurender or Auralic any day. If you use Roon, then why would you use a 3rd rate software like surrenders or even Auralic's?