The apartment of Ivan has a very special flair. We really liked this old building with its high ceiling and the classic interiors. Especially, the rooftop terrace with the BBQ place is a big plus and you can have asado every night.
The place is perfectly located for sightseeing trips. Either by feet you can go to all interesting parts of downtown (Congreso, San Telmo, Puerto Madero, etc.) and even for going to other parts of this huge city subte and bus stations are only 3 blocks (300m) away.
The only problem we had was a randomly leaking water heating tank. But I guess, this happens in such an old building.
I would completely recommend this place.