Communication with Mariano was very good. He was quick to reply. Our flight was delayed by 2 hours and he still waited and happily checked us in late at night.
The apartment itself was very well furnished and had everything we needed.
The location is the selling point. There are lots of restaurants close by. San Miguel market was 2-5 minutes walking which was convenient during lunch. The Palace was very close as well as grocery stores.
We were working from the apartment and the internet connection was good.
It can get quite noisy on a Friday & Saturday night but I think this is the sacrifice you make since the apartment is in such a good location.