A really lovely team who will help and look after you during your stay, and the apartment is just round the corner from La Sagreda Familia, with a supermarket just on the corner of the street.
We stayed there - 4 men - and there was plenty of room for us. This was during the Coronavirus outbreak so we had to stay indoors and the facilities were enough for us to cook our meals and make our own fun.
Grazia is walkable from the apartment and the metro station is just by the cathedral.