If there were ever a friendly, responsive and helpful host, it is Maribel. We had problems with the TV, she was there, we had problems with the washer, she was there, I needed an emergency health provider, she was there.
Maribel's apt. is located in Triana, a nice neighborhood outside the city center. However, it is within walking distance of the center, although it might be a bit far if you are a senior. There are nearby restaurants and a good-sized supermarket down the block, less than a minute away. At about a 6–10-minute walk, there is a mall whose second floor is an entire foodery. Also, on the third floor of the mall there a large, modern, very well-equipped, and clean gym, w/a lg locker rm, great showers and sauna. I was able to join on a monthly basis at $30, if you use the facility in the mornings.
The only negative about Maribel's apt. was a tricky washing machine wh/ will require a hands-on explanation. The on/off knob is broken. Machine is functional, however.