One of my best stays so far.
The appartment is like in the photos. Clean, comfortable, renovated, fantastic bed and fast wifi. Kitchenette is utilitarian though, in case you intend to make a heavy use of it.
The building is new and modern and has 24 hours security. The location is simply not to be beaten, regardlessyou are in Madrid for tourism or work.
The host is perfect, too. I would come back and recommend this apartment without reservations.