I stayed in La Casona for a month now and it's a good place to stay. It's a shared flat with mostly students and it has all the basic things that you need. If there is ever a problem you can always talk to Rocío, Lucía o Jimena and they will help:) While the location is really good in a nice part of San Telmo and it's connected really well by bus, this room is quite noisy at night. It's not because of the small cobble stone street in front of the house but because of the bigger Avenida around the corner. So definitely bring earplugs or consider one of the rooms that don't have a window facing the street. Everything else is great!:)