We had a great time.
What we loved:
(a) Our host, Enrique. He was really nice, met us before checking time as our plane came earlier, and explained everything. Thank you!
(b) The location is absolutely the best, In the middle of Great Via, in the lively neighborhood of Malasana, Metro and bus stations a few meters from the building, surrounded by restaurants, bars and stores (although inside the apartment is very quiet).
What we didn’t like:
Sleep was not very good: (a) Bed: A light that comes from inside of the building hit my face all night (the curtains on that window are transparent and don't block it). Also, there was no fitted sheet, only a flat sheet that slid and I woke up with my face over the mattress. (b) Sofa bed: My mom could only sleep on the half that faces the living room, since the other half was very hard.