hi michael,
I definitely have heard about that brand, although I never had my hands on one of these consoles.
AFAIK, they were built exclusively for state-owned broadcasting companies in the seventies. They are supposed to be as rock-solid as the other famous german studio gear like TAB, telefunken, siemens, etc.
don't expect this unit to color the sound in any way - I'm almost certain it has been designed to be absolutely neutral.
you might also look after some old philipps broadcasting-consoles, who are in the same league, but unfortunately as rare, even over here in germany.
just my 2 (euro-) cents.
regards,
michael