Nancy's place was in right in the heart of old town, a few minutes walk to most of the touristic sights. The apartment is pretty spacious with high ceiling. Wifi was fast and stable. It is facing the busy street with people walking by so you hear all the noise from the street from 8 am onwards. It is quiet at night though.
We were two people and the hot water in the shower was just enough for two of us to take shower (it gets milder towards the end of the shower). If you take in turns with some time in between, it would be more than enough for one person.
She was nice to let us have two sets of the keys, which made the life so much easier as you need the keys to go out of the building too (you cannot go out without having the keys). There is an OXXO convenience by the entrance to the apartment and lots of nice restaurants options within a walking distance including a good laundry place which can wash, dry and fold your clothes within a day.