Let's be clear: this place is very cheap, so if that's your priority, this is a great place that's well situated in the heart of Mexico City's best places. That said, there were a few things I wish I'd known before I booked:
1) The apartment is in a low-middle income housing complex. There are maybe a hundred units in several buildings all within the same lot.
2) The unit is on the bottom floor and while there isn't any traffic noise, there is a lot of noise from neighbors, including barking dogs and loud music.
3) There isn't a lot of ventilation in the unit, so we felt the air was quite humid and stale.
4) The sheets have small stains and the pillows are old.
Raquel is very nice though, and was available for anything. Again, this place is a good deal - it's reeeally cheap, so I guess you can't be too picky. These are just things I wish I'd known before I decided to book the place.