Has anyone dealt with RAUM Kitchens? Other German/Euro kitchen cabinet providers?

As one of the options, since we want a very modern Scandi/Euro style kitchen (both frameless and with some of the cabinets flipping up), I have come across RAUM kitchens. Very fast response times... but something in my gut is not sitting right, and I can't put my finger on it.

Anyone dealt with them (or even better) has their kitchen? Any other modern cabinet makers I should know about?