We stayed for two weekends in Mexico City in Francisco's apartment. He owns two apartments in the same building and we stayed in both. The neighbourhood is safe and the apartment is within easy walking distance to the subway, metrobus, great local restaurants and plazas.
The building itself is simple, and there's no real view, but that was the only drawback. Essentially, the apartment is identical to the photos - it's a small space, but excellently decorated to maximize the space. It was perfect for two people. There's interesting art and furniture in both apartments. Everything is clean, new and in good working condition. There's a laundry machine/dryer as well. The modern kitchen would be fine for cooking meals - all the basic utensils and supplies are there - but food is so delicious and cheap in the city that we never used the kitchen.
Francisco was good at getting in touch and he met us at the subway station when we arrived in Mexico. He gave us great suggestions for things to do and places to go, and was available at all times by text.

We'd definitely stay at Francisco's place again if we're in Mexico!