Here is my review of the experience.
First, thanks to the host for her responses and recommendations of places to visit, in particular the Martinez one which provided a unique experience since it was not a local non touristic place. Of course the "service company" that support the checking and your stay was very responsive.
Also, thanks for the fruit basket, it was a nice touch.
Regarding the place, the location was insuperable, right in the prime Santa Cruz district, within walking distance of the main attraction, hard to beat.
The apto is nice, with all the basic service, condition I would say is fair, maybe comparable to a 2-3 star hotel, kind of small but so of expected considering the location and that it is Europe.
Overall a pretty good value and I definitely would like to come back.
Thanks again Paula.