The flat is in a great neighbourhood for eating and drinking, as well as being close to the metro and good bus routes. It's a decent walk into the centre, but sometimes that is needed to work off the tasty food in Buenos Aires!
The flat itself is spacious and comfortable, with a good bed, a decent kitchen and good WiFi and dining table. It was usually fairly quiet, so was good for relaxing. Whilst there is some gym equipment upstairs, the large Always gym 2 blocks away is worth paying for if you are around for a while.
Our hosts were also very friendly and helpful, very close if we needed them and very understanding with a few things that went wrong. We will certainly consider staying here again when we are next in Buenos Aires.