We had a brief (one night) but excellent stay at Casa Azul. It is very charming, and even more attractive than the photos show. Our suite was spacious, clean, and the bed comfortable. It is located in a safe, residential neighborhood just a two-minute walk from Parque Hundido, which is perfect for a morning walk. Good wifi. Our hosts were gracious and could not be more helpful. This is a really good, affordable option in Mexico City.