We enjoyed out stay at Elio/Wilken's White House Flats. The building was very modern and easy to find. The rooms and toilets were very clean and comfortable.
I really liked that each room has a clothes rack system that allowed hanging of clothes, jackets and towels. Made it much easier to stay!
My only note is, as a person who prefers to sleep in the deep dark the rooms (toilet, rooms and laundry room for the flat) each has windows that look into a shared airwell, the windows are tinted and has a 50% sheer blind. So bring your eye mask!
Otherwise super convenient location near the Les Cortes train station , buses, supermarkets etc! Highly recommend.