The apartment is conveniently located a few steps from the metro station of Legazpi from which you can take short rides to the centre and all historical and turistical sites. Close to the house there are also bus stops running to and from the centre (I.e. from Paseo del Prado).
The small apartment at the ground floor is well furnished and very well clean. We stayed in very cold days, but the apartment was adequately warm.
Check in was smooth and perfectly on time. We got in touch with Bielka just after landing and when we arrived at the apartment she was already there. She is very nice and polite.
Me and my wife will recommend the apartment for anyone looking for a comfortable and not too expensive stay in Madrid.