I will amply recommend Pablo's apartment. The location is unbeatable next to Retiro Park. From the apartment we were in walking distance to everything that Madrid has to offer: parks, food, museums, bakeries, bars and coffee places.
The apartment is clean and we had plenty of room for our little family. The kids love it and that was for me the most important thing.
Our host, Pablo, was answering promptly and friendly to our questions and gave us the option of contact less check-in, which was special important for us since we didn’t know our time of arrival.
The apartment has fast wifi internet and Netflix. The kids were able to watch cartoons while I was working.
If you like cooking you will love the apartment. The kitchen is fully equipped with oven, fridge, refrigerator, microwave, kettle, stove and dishwasher.
My sister, who lives in Madrid, visited while I was in the place and she liked so much the place that she asked me to pass her the address so that she can recommend the place to her friends.
Thanks again Pablo :)