Mariano's loft was excellent! It was modern, well kept, and in a great location. I especially liked the outdoor patio!
Mariano was also an excellent host! It was like we were visiting an old friend. He helped us change money, made great recommendations, and basically told us everything we needed to know about visiting Argentina as well as Uruguay.
I highly recommend staying at his loft. He also has another small hotel he runs. I'd definitely go back!