Advantages: excellent check in/check out; excellent location, especially for tango dancers who want to be reasonably close to milongas ranging from Palermo to those on the other side of Av 9 Julio. COTO is just 4-5 blocks away on Gallo. Balcony and privacy. Storage is well organized in bedroom.
Disadvantages: pilot light on water heater randomly failed twice in 12 days; bathroom is "cozy"; if you are looking for nice city/street views, this is not the place for you; kitchen could use some additional amenities (e.g., cutting board; pot holders; wine glasses)
Overall, it worked for me for 12 days.