Arturo is an awesome guy. He told me everything about the city and even offered me his local bike pass that you can use in order to discover the city by bike. Additionally, he took some time and walked with me through the city for a few times, printed my online ticket - that I finally forgot, went for ice cream with me and once prepared a nice Argentinien steak. I can just recommend you to stay with him.
The room itself is a bit hot in the evenings and mosquitos are your neighbors, but Arturo provides you with some great equipment against them.
Good stay!