I had a friend who lived in "The Mansions", I lived in Harringay Road, probably late 50's era.
I remember The Mansions as being dark, dingey and unwelcoming. And having a musty sort of smell. I really didn't enjoy spending time visiting him there. But probably not all flats/occupants shared those characteristics. Don't think I ever visited the loos while there so can't comment on that aspect. But certainly not an endearing memory.
Must say now though, from the exterior, they look quite luxurious in comparison. Somebody has done a decent job on them.