I loved staying in La Posada Gotan. The hosts are very friendly and the Posada is beautiful.
You can really notice that the hosts take great care of the place, as it is impeccably clean and nicely decorated. They also make sure to give you useful advice on what too see and experience in the neighbourhood and the rest of the city.
It is a very calm place where you can recharge your batteries from the "beautiful chaos" that is Buenos Aires.
I find the neighbourhood "Boedo" where the Posada is located to be a very safe and tranquil area, with all kind of transports (buses, subway/underground) within a short walking distance from the house. Having lived in Buenos Aires, I chose Boedo by purpose, to have a more local and genuine experience (less touristy).
What can I say? I'm very happy for having La Posada Gotan as my "home" during my 10 day vacation and I can definitely 100% recommend it to anyone that is curious about visiting Buenos Aires.