The apartment has three bedrooms and two bathrooms which is hard to find so it was very nice to have that amount of room.
The apartment looks out over a very busy square and is 10 feet from a very busy road. The apartment is on the second floor. So as others have pointed out, it is noisy and there’s no way to get around that. One of the three bedrooms is facing that square and it was very noisy, but all the bedrooms had noise throughout the night from the nightlife which tends to go into the early hours of the morning.
The location is central to a lot of the sites you’re going to want to see, but there are plenty of areas of the city that are quieter and close to all the important sites. Madrid has an excellent Metro and bus system so public Transportation is very convenient throughout the city.
The host was very communicative and we got great instructions on getting there. There were dirty dishes in the cabinets, but they also provided someone to come in and do cleaning, wash the sheets and towels once during our two week visit. That was quite nice.
Just be aware that not much is provided. You need to bring your own shampoo, coffee and laundry detergent as well as dishwashing pods. There are plenty of stores within walking distance.
Overall a nice apartment although I don’t think we would rent it again.