Paulina's apartment is delightful. We honestly didn't spend much time there because the apartment is located in such a great neighborhood that we spent the majority of our days out exploring.
We only encountered one issue which was out of Paulina's control. Because of near by construction, the water was turned off one night. So when we got home from a long day out in the city, there was no running water in the apartment. However Paulina was very responsive and apologetic and explained that sometimes the city will turn off the water without letting anyone know. The water was only off for the evening, so when we woke up in the morning the water was back on.
Another thing to be aware of is that at times the water pressure in the showers can be subpar, but it was honestly nothing that bothered me too much- one just has to take a longer shower.
Overall, my friends and I had a lovely time and I would highly recommend staying at Paulina's while in Mexico City.