Luis and Belén are great hosts, they open their home to travelers that are planning to visit beautiful Madrid. Their apartment is a 7-8 minute walk to the metro (best way to get around Madrid) that is very easy to use. We had a rented car for our Spain trip but only used it once in our 3 days there. I do recommend Luis and Belen's place to stay but remember that you're sharing their home is not for you to do whatever you want while your stay there.