I stayed for almost a month in Fernando'a apartment and totally, totally loved it!!
He was super communicative, responded to all my questions and needs (airco down,stalling my bike in the building etc).
The apartment itself was super nice and compact: spacious enough to practice tango and yoga (reason why I was in BA). I loved also the balcony - perfect for having breakfast in the morning soon.
Location is walking distance to all cool bars and restos is palermo soho but peaceful and quiet (lots of green trees in the street). Metro relatively close by (plaza Italian).