Irina is a really flexible person and was very understanding of us when we got stranded at Teotihuacan and had to check out late. That was great!
I do just want to note that the apartment is in an area that is someone run down, with many homeless people and street workers in the area. We were fine, but I wouldn't walk in the area at night alone as a woman. The apartment is also quite noisy given the way the building is constructed (with a central, echo-y staircase).
All that said, we enjoyed our time here and it was a great find for a very affordable price.