Paloma & Víctor are great hosts, helpful and good connoisseur of their city. Their Appartment location is wonderful too - in a peaceful area with grocery shops and cafes around, open till late night and with right access to main "touristic" Metro lines 2 (Plaza del Sol and Prado) and 10 (Plaza de Espana and Santiago Bernabeu).
Jeremy the cat is very friendly too. :)