Martha's place is excellent. The apartment is clean and well located for getting to both the Basilica de Guadalupe and also the Centro histórico.
Even better, Martha likes to make her own jam's and then bakes jam cookies which she dusts with icing sugar. She sells them locally and they are really worth a try.
Lastly, she has the cutest little dog called Tobias. He and I became great friends and I am missing him.
If you are a person who enjoys a clean and comfortable place along with almond cookies - then Martha's flat is strongly recommended.