We were travelling to Buenos Aires to learn Spanish for a month at the start of a 4 month Sth America trip. After some nightmare youth hostels we found the B&B Posada de la Luna. Eli was immediately welcoming when we came to look at the room and we liked her and the place straight away. Eli and her family renovated the building themselves in around 1999 and they have really taken care to keep the old features. It's truly a beautiful building to stay in. As it was winter it was a little chilly in the room at times, but plenty of blankets were provided. The outdoor areas are beautiful, although it was too cold for us to make use of them.
Breakfast was a highlight of our day, fantastic food including freshly made bread and always a friendly face to chat to us and offer advice. We were fortunate to have Eli's daughter, Laura and son-in-law, Max staying for a week at the same time we were there and they (and Eli) speak fantastic English and were very forthcoming with tips and help with our Spanish. Oh, the whole family also speaks French too!
We really felt at home staying at Posada de la Luna. We were in one of the smaller rooms, but the absolutely beautiful Luz de Luna room would be our pick for a shorter trip (with a little more money). The B&B is really excellent value for money and very centrally located for the sights in the centre of town, Puerto Madero and the wonderful antiques market on Sunday in San Telmo. It is also close to both buses and subways to get to other areas of interest such as La Boca and Palermo.
Only thing worth mentioning is that there is a live music venue next door that seems to run on Friday and Saturday nights. You CAN hear it through the walls, but it generally seems to finish at about midnight, but it may be annoying if you're trying to get an early night. I believe there is a room that you can't hear the noise from. It certainly didn't bother us as it seemed to be acoustic music and you'd be hard pressed to find somewhere (other than a luxury hotel) in San Telmo that ISN'T near a music venue or club of some kind.
There is wifi available, but it is based in the breakfast room at one end of the building, so the further away you get the worse the signal. There are lovely little tables on the landing that you can sit at that have a good connection, or the breakfast room is available for use at all times of day.
So, we are planning to return to both Buenos Aires and Posada de la Luna in October. It is really a great place to stay.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC