Bertha was very responsive, and arrangements for her sister to meet us were very smooth. The place is lovely, larger than it appears in the photos. There is nothing like having the big window open to the sounds of music, organ grinder, etc., bringing home the delights of Mexico City. The neighborhood is unbeatable, full of charm, cafes, shops, grocery. We discovered the washing machine worked speedily and well, despite the caution to the contrary from Bertha's sister. We did not realize that we would need to meet Bertha at the conclusion of the stay to turn over the keys, but fortunately traffic did not prevent her from meeting us promptly at the agreed time. We will definitely want to stay there again!