This is a really nice little studio apartment in a great location near Plaza Mayor and Plaza del Sol. It was so easy to walk everywhere or to use transit or catch a taxi if needed. The kitchen was well equipped and it was nice to have things like salt, pepper, sugar and coffee. We only made breakfast but you could easily have prepared a larger meal.
The apartment was clean and comfortable enough for our family of 3.
It was wonderful to have access to the swimming pool, especially with the heat of the summer reaching 40* some days.
Jose provided 2 good fans. However, it was difficult to sleep on the hottest nights.
Overall, we'd definitely recommend this apartment to stay in Madrid for most of the year. However, I'd recommend finding a place with air conditioning for the summer in Madrid.