The apartment was very nice, ideally located, though a bit cold (but Carolina was about to add a 4th heater so there would be one in each bedroom). We loved the secret maid bell under the rug whose ringing intrigued us for some time.
Unfortunately we were not able to stay in Carolina's apartment because the upstairs neighbors were doing horribly loud works (removing the entire tile floor) the whole day long. Carolina efficiently booked us a new place to stay for the remaining of our trip.