This was a great stay. It's not a big place, and it's not grand, but it is very well-located and more than adequate.
Pros:
Very good water pressure
Plenty of hot water with little delay
Doorman was on-the-spot
Host was very responsive and was easy to communicate with in English.
Easy walk to plenty of coffee, markets, shops, and restaurants. A coffee and medialuna from Terra was a frequent, affordable, and easy breakfast.
Quick/cheap Uber or taxi rides to the tourist highlights downtown.
Affordable
The balcony is nice. It's not a very fancy view, but it is a nice place to catch a breeze and drink a beer.
The appliances and fixtures were in good shape.
Easy bulk trash/recycling in the stairwell across from the elevators.
If you're into Tango, Salon Caning is only a few steps away.
Cons:
The views are not quite as nice as the photos suggest. The buildings are a bit dingier that they would seem from the over-exposed photos. In general, the photographer did a good job of making things look a little bit nicer than they really are.
The window next to the bed has an easy view to/from the neighbors, and the blind has to be up to let any air through. The AC works, so it's not a big deal, but it'd be pretty easy to give the neighbors a show if you like the breeze and sounds of the city at night.
Laundry tokens are apparently in short supply. Don't wait until the last second to get them if you have a tight schedule.
Overall, I have no regrets and enjoyed the place a great deal.