Our stay at Cristian’s place was splendid. He is great at communicating with you and very friendly too. He even helped us with our luggage since the apartment is on the third floor and there elevator does not work.
Overall we had a fantastic stay and would recommend for groups of two or three people. The place is quite small, probably 25sq m, but it has everything you need for a stay in the heart of Buenos Aires.
It is located within walking distance of some of the most iconic places in the city and that alone makes it great. The building itself is a bit dated but it is pretty acceptable.
Mercado San Telmo is less than 10 minutes walking and I recommend you visit.
Like I said, great place for those on a budget. The place is clean and has everything you need.