I would strongly recommend this Airbnb. It is stylish, modern, clean and very functional. It is also located conveniently near all interesting central neighbourhoods like Sol, La Latina, Reina Sofia and Prado and a few metro stops (if you don't want to walk) to neighbourhoods like Salamanca and El Retiro park.
Carmen is a very friendly and helpful hostess and will assist with all your needs.
The apartment is quiet, accesible by card key and located close to several supermarkets and a 3-5 minute walk to the nearest metro statsions.
You won't be disappointed if you rent this space !