7 of us visited Mariella place for two nights. Communication was great. Even though Mariella does not speak much English communicating with Airbnb texting was easy. She was waiting for us by the apartment when we arrived and every instruction she gave was clear.
Apartment itself is ideal for a large or small group. Very well maintained and in a good neighborhood. Its not close to the center but the metro station is 5-10 min walking away and there is a supermarket right outside the compound.
Note that there is no WiFi here. Did not matter to us, but something to know.
I highly recommend Mareilla's place!