I had a lovely stay at Rosa and Marco's place. It is very secure and clean, and comfortable. Most places you may need to travel to are only 15-20 minutes away (depending on traffic). The location in Centro Historico is excellent for getting in and out of this area, and there are many nearby public transport services. If you want to see tourist sites or popular colonias, this is also in nice proximity to Reforma, Chapultepec, Palacio Bella Artes, Zocalo, Templo Mayor, and the Juarez, Roma, and La Condesa colonias. There are also many authentic tianguis and mercados in the area for food. The best part of my stay is that Rosa and Marco are extremely friendly, eager to practice your Spanish or their English, and so helpful and hospitable. I usually prefer Airbnb spaces to myself, but sharing the apartment with these excellent hosts was a wonderful experience. I would gladly stay again, and you should book with confidence.