This apartment itself is very clean, comfortable and nicely furnished with everything you would need for a stay in Madrid. Most major historic attractions are within a 30 minute walk. In the area of the apartment there are great tapas bars (e.g., on Cava Baja) and the wonderful Rostra flea market on Sundays. A couple of things to also note: homeless individuals sleep on the street and benches in front of the building (in case that is something that will be upsetting for you). I also experienced a difficult time getting access to a locker containing keys for check-in, but it eventually worked out!