Great location next to and right across the street from excellent cafes and restaurants. A special shout-out to Denise at Cafe Lezama a block up Caseros and Patagonia Cafe kitty-corner from it. Parque Lezama is a nice place for a stroll. The heart of the San Telmo is only a few blocks away.
The unit is a good size and well-equipped. Up a single short flight of stairs from the front door followed by a much longer flight up to the 1st floor (US 2nd floor). There is an elevator but you still have to navigate the first set of stairs to get to it. It feels slightly odd that the door and windows open directly onto the walkway on the inside atrium so anybody walking past can look right in but it wasn't a problem in practice as almost nobody passes that way. Very little noise. Plenty of water pressure and hot water.
Host was helpful and communicative.