I rented this flat for a 2 weeks stay for my parents (a couple in their late 70s). My parents arrived early in the morning to Buenos Aires and Oscar, the host, was kind enough to receive them in the flat to leave their luggage even though it wasn't ready for them yet (someone have just checked out). He even offered to keep their bags at his home a few blocks away. He also was able to communicate through whatsapp which made things easier. The host provided with complimentary toilet paper and soap. It was of course not enough for a 2 week stay but it was nice to have it upon arrival. Upon request, it was also possible to have the flat cleaned after the first week.
The flat is located in an amazing area with lots of access to underground, buses and restaurants. It is located in an old building with just one lift but everything is clean and accessible. The flat is big enough for two people. However, for 2 weeks the place might feel a bit crowded with things that are not necessary to be there. For example, a frame for a painting that was not being used and a chest of drawers that has too small compartments for storing clothing (probably left there because they didn't know where to put it). Also, the flat lacks proper space to hang shirts or trousers because the space provided is too close to the floor. I told Oscar about this and he said that he will fix the problem ASAP so maybe that will no longer be a problem in the future.
The bed is very confortable and spacious. The sun doesn't face the flat during the afternoon so it makes naps possible. Be aware however that if you need darkness to sleep you need to close the blinds as there is no curtain provided. The flat's floor is not in amazing shape and the plates provided neither. Everything is clean though so I guess that doesn't bother everyone.
Overall, I recommend both the flat and the host. I would probably use it again, specially for shorter stays.