"Additional features controlled by hardware DIP switches on the back panel; no software-only features and no control panel." — now, that's an attractive line to read on a features list. And it's a standards-based interface which is always nice. USB Audio Class 2 (and Class 3, today) is well-supported in ALSA, meaning specialized-hardware-driver-less access to the full range of available sampling frequencies and bit depths from Linux.
Those f---ers still go for $900 at B&H, though. Too rich for my blood, as enticing as it does sound. I'm sure it's a worthwhile investment if you've got sufficient resources to commit.