I stayed with my son and husband at Eduardo's place for two days. His apartment is in downtown BA so good for visiting the center of the city and Teatro Colon. The apartment is very tastefully decorated and has a separate bedroom for my son, which he really appreciated.
Eduardo was there when we arrived and helped us with some restaurant suggestions. There was a lot of rainfall one day and his apartment toilet got flooded but the situation was resolved in a few hours. I guess one has to expect that as many of the BA apartments (like Eduardo's) are very old and require much maintenance.
I would recommend his place for a short stay in the center of the city.