We had a great time at Ralf's apartment. The photos make it seem a bit bigger than it is but it was perfect for two people. The location is great, within walking distance to the shops in Palermo Soho and most of the museums in Buenos Aires. It's around 8km walk from San Telmo though. The taxi from the airport only cost 60-70 reals. Ralf's team was super accomodating and helpful. Overall we had a really great stay and we would highly recommend it.