Mónica's apartment is a beautiful, modern space in a fantastic location. She was there in person to greet us and make sure we had everything we needed and was responsive to questions both before and during our stay. We stayed with six people (two couples and two teenage children) and we were all very comfortable. The apartment is half a block set in from the Urumea and a short and beautiful walk from San Sebastian's Old Town, and you have everything you need right on your doorstep. We stayed in March and so did not need the AC but I assume it is quite a necessity in the summertime, as the apartment has many large windows and is filled with natural light.