We really enjoyed our stay at Jessica's place. The appartment is on a really quiet / peaceful street about 10 mins walking to a couple of metro stations. The instructions for entry were really simple and although the front door opens straight onto the street it felt really safe.
The appartment had everything we needed (iron, hairdryer, coffe machine etc). Jessica was easily contactable. I'd 100% recommend and would stay there again if I was to return to Mexico City.