Hernán's place is very very nice. Located in right in the hip neighbourhood San Telmo, there are many things to see and do right outside. The bnb itself is also great and it has a big balcony. Last but not least, Hernán was a very good guide, giving a lot of good advice on how to avoid tourist traps and find the good restaurants, bars, views and milongas (for Tango). I would recommend his place 100%