My husband and I stayed in the apartment for whole 2 weeks in mid-March, and generally it was a great experience - both the city and the apartment.

The pros are a flair of a century-old apartment with magnificent room heigh and tasteful decor, as well as location in the actual center of the city (good for "general tourism"). Cons - very loud Avenida de Mayo (living room side), and with the good-but-old windows it gets annoyingly load during business hours, which is not a problem unless you need to stay in the apartment during those hours. Unfortunately, missing component was the personal touch that AirBnB is nice about - the landlord Ronnie never showed up (despite our extra-long stay), though based on the apartment he should be an interesting person...