Overall, we enjoyed our stay in Madrid!
The apartment was great and very well-equipped. He has a microwave and refrigerator with the basics in the kitchen. It's nice to have a sink in the bathroom and in the kitchen. The apartment looks newly renovated with cute decorations and a very fancy bathroom! It is spacious and he provides towels, shampoo, conditioner, and make-up remover. The shower has a lot of different settings, which is awesome! There is a TV, which we did not use. The bed was very comfortable and there are 2 heaters. The wifi is not as fast as we are used to in California and we had a difficult time uploading pictures. The location felt safe and was walkable to what we wanted to see and do (about 20 minute walk or less to everything.) Also, 1 minute down the street is a lot of restaurants and shops, including a grocery store.
Just be aware that there are 4 steep flights of stairs up to the apartment. We knew that and were okay with it, so just make sure you're okay doing a lot of stairs. Ruty was very kind and helped carry our bag up though, which is the only part we were worried about with regards to the stairs. There is currently construction in the building, which is noisy during the day time. If you are concerned about that, Ruty is very responsive and can let you know if construction is still ongoing. Also, be aware that it is on a street with a few restaurants and bars and people stayed out until 5/6 am, so you can hear some conversations.
Ruty was very responsive every time we messaged him. He has some maps and guides in the room as well. We would definitely stay here again if we get to go back to Madrid! Also, check out Rosi La Loca if you have time. It was one of our favorite dinners we had in Spain!