Juan was a great host. He was always available by texting whenever we had a question. He was very accommodating.
The apartment was exactly as shown on the photos, we were very pleased with it. It was safe, immaculate, had nice decor, the bed was a real queen size and was comfortable, there was a lot of storage, it was spacious and airy, lets in a lot of light. I loved the Juliette balcony that opened out to the square. The square has a little park for kids, and there are a few restaurants that set up in the plaza.
The apartment is well located, but remember you are in Chueca, there are times where there is a lot of action going on outside, its a bustling area of the city at night.
The apartment is very close to everything, we walked everywhere- from Retiro park & the Prado to the Plaza Mayor and Gran Via & Plaza del Sol (5 min walk), even to the Royal Palace and the Temple de Debod and Teleferico (30min walk). The apartment is also close (less than 5 min walk) to two main subway lines which we used a few times (very easy to use).
In summary, if I were to come back to Madrid, I would definitely seek out one of Juan's apartments, he keeps them in great condition, feels like home, and he is very organized.