We stayed at Javi's for 3 nights.
Javi and his girlfriend were very hospitable and welcomed us ahead of the check-in time as we arrived in Madrid earlier.
The apartment is located in the Malasana area of Madrid which was surrounded by plenty of eateries and local bars which made it perfect.
Metro station of Tribunal is only a couple of minutes away by foot which made Javi's apartment well accessible to many places in Madrid.
Javi prepared plenty of travel tips in the room and most importantly, the room was air conditioned in the Spanish summer heat!
Highly recommended!