We stayed in Natalia's apartment for 5 nights and really enjoyed the warm spring in San Sebastián. The positives about the apartment are the light and the terrace (rooftop on 7th floor), while the negatives are that it was a little bit dirty (not a major problem, but there could have been made a little more effort in the cleaning of the apartment) and that the kitchen is quite old. But the positives beat the negatives in our case and we enjoyed the stay. We are a family of two children (4 and 6), and loved the Plaza Catalunya just a couple of blocks from the apartment. I also have to mention that Natalia is very kind and welcoming, answering all questions in an instant, so that is definitely a major plus. The location is also very good, you have a short distance to the (surfer's) beach, although with smaller children you would prefer La Concha since the water is shallower and the waves smaller. No problem to walk to either of the beaches, nor the old town, though. So, we have no problem recommending Natalia and her apartment for those who want to stay in beautiful San Sebastián! :)