We spent 4 nights at Casa de la Covadonga in April 2017. This accommodation has an appealing layout - a loft studio with an open floor plan. However, it would have worked better for us if it had counter space for food preparation, sharp knives and adequate cookware in the kitchen area. We ended up eating out much more than we had planned. There is not a couch or other comfortable furniture in the downstairs entry room. We experienced major shower/toilet problems, however, they were fixed the day after we contacted our host.
Casa de la Covadonga is an apartment in a charming centuries old building that was built as a convent for young girls. It is located on the edge of the Zocalo, the center of Mexico City, within walking distance to many cultural and historical attractions. A real plus. However, as two women travelers, we did not feel safe to walk in the neighborhood after dark. Loud parties in the neighborhood on Saturday and Sunday kept us from sleeping. But maybe that is a rare occurrence, since it was a holiday weekend (May Day).
We had trouble reaching our host when we arrived at the airport. He is only available by whatsapp but it took him awhile to get our whatsapp messages and he did not leave to pick us up until he did, so we reached the apartment 1.5 hours before he did. A kind neighbor let us into the courtyard of the apartment building so we could wait in comfort. Alfredo recommends that you don't drink the tap water, so be prepared to get a large container of bottled water right away upon your arrival. There is an OXXO a block away, but we did not find any real grocery stores nearby. Plan to go outside of downtown to get groceries.
We used Uber to get around when we weren't walking or using the Turibus, and that worked well for us. As you can see, our review of this accommodation is mixed, but we loved our visit to Mexico City, although 4 days is not enough, but we already knew that!