Maximiliano's place is perfect! I came to Buenos Aires for about a month to work remotely and travel. The location is excellent, the wifi was great (I believe it was 54mbps download) and never had any issues while I was working, the space is comfortable and he was great at communicating with me as well as giving me tips for around the city.
Location: Recoleta is an amazing neighborhood! The buildings are beautiful, it's easy to walk around and I felt very safe (was traveling solo as a female). There's 2 coffee shops right on either corner of the block, a grocery store just at the end of the block and so many restaurants all around. I found a gym (Libertad-would highly recommend) close by and everything else I needed was walking distance.
Space: The bed and pillows are very comfortable (a decent firm) which is important for me because my neck often hurts with a crummy bed. The view to the beautiful apartments across the street is really nice from both the bedroom and the living room. The bathroom was big enough to store what was needed for a month's stay. The kitchen had everything I needed to do some basic cooking while I was there. You can hear street noise but it wasn't terrible and it's a city so you have to expect that. It didn't prevent me from sleeping or doing work and I actually enjoyed it.
Maximiliano made it easy to communicate with, helped with coordinating a ride for me from the airport and checked in with me to make sure I had everything I needed while I was there. Overall, would highly recommend his place for a short or long term stay!