Ignacio was rather helpful before and upon arrival of our stay. He advised us on how best to get to the apartment and checked with us on whatsapp what time we would be arriving on the day before.
We took a taxi all the way to as close to the apartment as we could. If we would have taken the directions, it would have been indeed only a 5 minutes walk from the corner of San Francisco square.
Ignacio's partner was to meet us to check in. As we were a bit earlier and the front door was open, we already went up to the apartment. Indeed the steps up is not for everyone, or for very heavy luggage.
Luckily the cleaning lady was there and we were let into the apartment.
It surely looked like the photos. Spacious, light, with plenty of kitchen ware. Some coffee and tea is also there.
When Ignacio's partner arrived, he showed us around the apartment, gave us the keys and showed us the "tourist guide". All very clear and easy.
The apartment is rather central located next to the Nueva Square. A supermarket is 5 minutes away. It is on the main shopping street, what can be noisy at night (late partygoers, cleaning crews, etc).
But it is a stroll away from the Cathedral and Alcazar, the Mushroom. Also the river is not too far walking away.
The list with local tapas places put together by Ignacio is certainly worth trying ...

All in all, we had a very nice and comfortable stay.