Alfonso's apartment is amazing. 5 minutes walk to Palacio Real, very close to Plaça Mayor, the location is ideal.
The room and the apartment are very nice (even more than what it looks like on the pictures), everything is clean and comfortable.
We didn't had the chance to meet Alfonso as he was on a trip but his friend was very nice and welcoming.
We totally recommend this apartment and if we go back to Madrid we will for sure go back to Alfonso's.