Rosenblatt's beef is under the Hashgocha of the OU and CRC Chicago. It's staffed by highly experienced, erlicheh yeshivishe staff. The standards and staff set up of the Shechita, Bedikas and Nikur are what a ben Torah would be looking for.
At this time we are only addressing the beef, as we
don't have sufficient information re: Veal, Lamb, etc
The Rosenblatt beef is available in Lakewood (back of capitol hotel), Brooklyn, etc.
It's currently only sparsely available in Queens ,Five Towns and Lakewood, etc due to the political standards in place.
Sfardim should be aware that much of the "Bais-Yosef" beef they are using is not Bais-Yosef in fact only by label (AKA- Minhag-America). The Rosenblatt beef meets the true Bais Yosef Standards.