Everything was perfect.
Check-in was very informative and Alberto is a very accessible person, just like his father who welcomed us.
Perfect location because in less than 15-25 minutes by transport we are in the center of Madrid.
Cafes, mini market and basically everything around the house. Metro station 5 minutes walking.
I would certainly stay at Alberto's house again.
Oh! I almost forgot. The house is very beautiful and modern.