As someone else said it best, Lily's place exceeded all expectations! The place has a charm to it as it's in a gentrified old section of the city with many restaurants (including a delicious taco place two blocks away) nearby. I felt very safe walking around the neighborhood at night. If you're feeling lazy, there are two restaurants next to the building. The nearest metro station (Insurgentes) is about a 10-12 minute walk away. The place is way more affordable than many of the nearby hotels in the Zona Rosa area.
The only regret is that I wasn't able to meet up with Lily until my last day (briefly) as she was on vacation for most of my stay. That being said, she made arrangements to leave the key for me and was gracious enough to let me have the place to myself. The place is recommended as I will be happy to stay here again if my travels bring me to Mexico City again in the near future. :)