The appartment was very well located, near many restaurants and the city centre.
The place was clean and well maintained, with coffee/tea and cakes left for us. Although lacking natural light (appartment located on the ground floor), the price we paid was more than worth it, as we only stayed in it at night-time for sleeping. Would recommend if you're looking for a conveniently located place to visit Madrid for a short period of time.
Communication was also very clear, self check-in made easy.