We stayed two weeks here. This was a lovely apartment, we really felt like we were in Buenos Aires. It has lots of character - you can feel the history in the walls. Very close to everything and we walked everywhere. But really quiet because it's set back from the street.
Our hosts made sure all our needs were met and were very attentive in helping sort out some small issues when we first arrived.
It does have 2 bedrooms but couples should know that neither are really private, as is the nature of a loft conversion. It wasn't a problem for us as two single travellers but some people might want more private accomodation. If you are looking for an authentic BA experience in one of the best and most central parts of the city, you should definitely consider Norman and Yamillas' apartment.