The apartment and its view are exactly like in the photos. Inside it is very clean. Pick-up was great. However, I do not think the apartment is worth the money I paid, especially for longer stays. If you are staying for a few days and if it is your first time in Madrid, the location is good- being at Plaza Mayor will orient you well in the city. However, if you are staying longer than a few days and if you already have been to Madrid before, there are equally convenient locations as Plaza Mayor, for less money and for bigger apartments.
The location is very noisy with all the restaurants, tourists and trucks delivering to the restaurants early in the morning. You will not be able to keep your window open due to the noise coming from Plaza Mayor. So, I would not suggest this apartment for seasons when you might want to have the window open. When the window is closed, the noise is not disturbing.
There is not a single comfortable chair in the apartment. I told this to the host, however, I did not get a response.
The bed is two single beds next to each other and is not comfortable. You have to sleep on one of them.
The heating is AC. It was fine for November and they provided me with an electric heater, as well, but I am not sure how efficient it would be in colder months.
In short, there are a lot of apartments on airbnb of the same quality and even better, bigger, but for less money.