I had the pleasure of doing the Superior/#1 Pho taste show-down last week.
Superior won. The broth had more flavor, the noodles were a better consistency and the meat was perfectly cooked. And unlike #1 Pho, the tables have enough sauce for everyone, not just minuscule amounts to pour on the pho.
Service was far more hit than miss. But the place is small enough it was easy to catch the server's eye.
But Ferrett is correct. If you go in through the front it is the building with a red awning. Through the soul food restaurant, past the CPAs office. Into the hallway. Past the other restaurant and the knick-knack store. Down the rabbit hole... and into Cleveland's best pho.