I had a wonderful stay at Alejandra's place. It was a small studio unit on top of the house. It was mostly quiet, and I enjoyed my peaceful time there. The house was only a couple of blocks from the big park ("El Bosque"). I originally chose this place because of the location (I like running in the evenings), but as it turned out, the park closed pretty early (5PM every day). Other than that, I had no complaints.
Oh, for the people traveling to CDMX for the first time, the summer is a rainy reason here. (it literally rains every day.) And, the daily highs are around 70~75. It rarely reached 80 during my stay.