The apartment lies between two Metro stations and is therefore nicely located for a city trip. There is also everything you'll need in shops closeby (a really nice bakery is just around the corner) and in the apartment itself. We always enjoyed our breakfast in the flat.
It was also very clean and nicely decorated with a large kitchen and dining table for 6 people. A cozy sofa to relax on is also part of the living/dining room. The bedrooms are rather small but you're not gonna need more for a city trip. It was very nice to have 3 bathrooms to the 3 bedrooms, which were equipped with towels and soap.
Overall it was a perfect stay for our party of 6 in this flat. Highly recommended to anyone visiting Madrid in a larger group.