We had a fabulous stay with Isabelle. Her uniquely appointed apartment is in the middle of Chueca, a great neighborhood for shopping and eating and a 10 min walk to all of the major museums. You stay in the front, light filled 3 rooms of this large flat plus you have access to the dining room and your own private 1/2 bathroom.
Staying with Isabelle is a true b and b experience; she fixes a large tasty breakfast every morning complete with good conversation if you are so inclined. Stay here, you won't be sorry!