The apartment is great and looks exactly as described and shown in the pictures. The kitchen has everything one would need to cook food. The bedroom is great with a comfortable bed and an aircondition for warm summer nights.
The location is also good, with two metro stops only three minutes walking from the apartment. The metro can take you directly to the city centre in a few minutes. Madrids central train station, Atocha, is also located in a walking distance, a walk of around 10-15 minutes. Nearby are also several grocery stores.
However, the building right next to this one is undergoing some construction work which produces quite loud noises. This has not been a big issue, as the working happens in working hours in weekdays from around 08:00 to 19:00, when one usually will not be in the apartment. This is however something one should keep in mind.