Mariana's apartment is in a fun part of Condesa, full of nightlife and restaurants. The apartment is spacious enough for two couples (we were just one). The terrace is nice to have, although I didn't realize that it was walled in on all sides by other apartments.
There were a few inconveniences: there was no shampoo or soap in the shower, and the shower itself didn't get very hot or have much water pressure. It was also pretty noisy at night; we had to keep the windows open for it to be cool enough to sleep, but there's a loud HVAC system outside one of the rooms and there were some late parties on Saturday night. There's also one floor-fan with a loose connection somewhere that made irregular clattering noises all night, so we had to turn it off.
Overall, it's a good jumping off point if you're on a tight budget.