We stayed at Alvaro's place for 9 nights, it felt like home and he is very responsive to messages and friendly. Thus, we highly recommend his place. It is a small apartment with everything equipped, we could even work in the room if we wanted to. It is a perfect location, where is walkable distance to lots of highlight points in the city. It is also surrounded by shopping streets, cafes and lots of good restaurants.
The only suggestion I want to give to Alvaro is: if you could change the bed to a bigger sized bed, it would made it even better. At night, almost every night at our sleep we accidentally kicked each other's ass when we were turning :D.