We spent a week at Danilo's apartment in mid-September/early spring, and we had a fantastic stay. Everything was clean, the kitchen was fully supplied (with utensils/pots/utilities, not with food) even including things like a blender that I almost never see in rented apartments.

The location is great and walking around in the area feels (is?) safe even late at night. It's well-connected by bus and subway to pretty much anywhere you'd want to go, etc.

We asked Danilo for a suggestion on how to get from the airport to town, and we went with his suggested driver (Rolando - also English speaking) who we paid something like 500 pesos (using USD at a conversion rate of 15-to-1, compared to the government rate of 9.4-to-1 at the time) so it ended up being quite a bit cheaper than a regular taxi too, since we had no pesos coming into the country.

Danilo's English is perfect, and he was a gracious host despite a few mess-ups on our part (we booked our stay off by one day and had to change it a week in advance, we lost one of the apartment keys, and we missed the 2pm checkout by a couple hours; 2pm means 2pm, as he has a cleaner come!) all of which he took in stride.

The apartment was very clean and everything worked fine. The hot water in the shower is indeed pretty hard to get to the right temperature the first couple days of the stay (the difference between "cold" and "scalding" is about a 2cm turn on the handle, and it takes about 20 seconds to make movements turn into temperature changes). This was mentioned in the listing, so it wasn't a surprise nor particularly a problem!

There are some guidebooks to Buenos Aires and Argentina around the apartment, and likely Danilo can answer any other specific questions you have about Buenos Aires and its environs.