I had a great experience in Buenos Aires staying at Casa Maria!
As a college student spending two months interning, the location and set up was perfect. The house is located perfectly in Palermo with easy walking access to great restaurants and bars. Additionally, it is right next to the subte station as well as numerous bus stops that go almost everywhere, making my commute across town to work and other places really simple at all times
Maria rents out all six rooms in this house and having the other housemates definitely made my experience. As I did not know anyone prior to arriving, it was really comforting having the roommates for support, and many have become really close friends.
The house itself is really comfortable and well maintained as someone cleans the shared areas (bathroom, kitchen) Mon-Fri and each room once a week (clean towels and linens included!). A major bonus is the awesome balcony or terraza that has an amazing view of the city. Although I didn't get to use it too much as I stayed during winter, the days when the sun was out were spectacular.
This room specifically was great for me - the high ceilings made it feel very big and there was plenty of closet/dresser space. It occasionally gets loud as it is right next to the kitchen/street but nothing to be concerned about in my opinion.
Maria is very helpful and responsive. Anytime there were issues with anything in the house (wifi, toilet, shower etc.) she was easy to reach and responded quickly.
Overall, I would definitely recommend staying at Casa Maria. It is not the most luxurious palace but that only adds to the charm. It's a great location to meet awesome people and experience the city of Buenos Aires.