We were supposed to stay for 2 months but after one month we decided to leave to another place closer to our university. Nevertheless, Buenos Aires is a huge city so the location is good but you have to make sure it suits your needs, for us it turned out to be quite far. We communicated that with Federico and wanted to change the dates of our reservation with two weeks' notice. Sadly, he wasn't very nice about it so we had to cancel our reservation and pay the remaining money.
Apart from that, the apartment is nice, well-furnished but the windows are pointing to the inner block surrounded by high buildings so there is not much sunlight during the days. Also, there was often noise from the other buildings inside the block.