We are a retired Canadian couple who stayed in the apartment for a month. Our son and his fiance accompanied us for two weeks.
This was our fifth trip to Buenos Aires, and our first apartment booked through Air BnB
The apartment itself was great, furnished in tasteful boho/shabby chic style, with a wonderful fourth floor open air patio which we used quite a bit.
Unfortunately, there were quite a few maintenance issues.
When we arrived, three of the overhead lights were burned out. We could not replace them because of the 15 foot ceiling height, but Ailin, Philippe's assistant, did replace them the next day.
The fridge had issues. A broken shelf jammed the door so food spoiled until our son spotted the problem and fixed it.
The flush mechanism in the toilet on the second floor broke early on and was never fixed.
But the most serious problem was the air conditioning unit in the third floor master bedroom, where our son and his fiance stayed. It was dead as a doornail and remained so while they sweltered throughout their stay. Ailing provided a fan, which helped a bit, but you do not want to be without air conditioning in Buenos Aires in March.
Philippe, who lives in Barcelona, was in Buenos Aires towards the end of our stay. He and his wife dropped by, and Philippe expressed regret at the dead air conditioner, and volunteered to rebate an undisclosed part of our rental fee.
That was the last we saw of Philippe. The rebate was never paid.

We own rental properties in Toronto and Montreal, and realize that things go wrong. But a sure way to make tenants unhappy is to ignore problems, and to promise and not deliver.

If you do rent this property, which is attractive and well located, be sure to get an iron clad guarantee that all of the maintenance issues have been addressed before you arrive.