Of all the Airbnb's we've stayed in during our time in South America, this has to be the absolute best. Don't think, just book it.
The location is right on Defensa, surrounded by cafes, bars & restaurants. On Sunday you're in the literal heart of the San Telmo markets. Its easy to find & well connected to other areas of BA.
The apartment itself...well what can I say? Its like a tardis, so unbelievably spacious! Each room is immaculate, clean, & extremely comfortable. It had all the listed amenities (washing machine, cooking basics, washing powder, iron, hair dryer etc) meaning we felt right at home straight away. The bed was comfy, the smart TV worked great, the kitchen was well stocked...honestly this place was superb. Plus it was very quirky and we loved all the old features of the house.
Hands down can't recommend this place highly enough!! 1,000,000% would come back!!