The location of the apartment is really great - 4-5 min walk to three main art museums of Madrid, 2 min to Botanic gardens and Retiro park. All the transport is really nearby.
The flat itself is spacious enough, with good amentities as described. A little bit problem with the lack of shampoo and the amount of towels and toilet paper for a week (solved after our ask).
Friendly host with a lot of emphaty that one feels from remote communication.
To summarize: highly recommended