I stayed at Bruno's apartment for 2 months. The apartment has a superb location, in the heart of Madrid's nightlife.
Bruno is a great host, I highly recommend him to anyone visiting Madrid. He made me feel like home, introducing me to his friends and occasionally cooking.
The room is quite small, not ideal for long term rents, but works fine for a couple of days. It only has 1 bathroom which wasn't convenient for 3-4 people.