First thing: if you are coming via metro use Line 1 and stop in Dante, I made the mistake to use line 2 as Google suggested and had to carry my luggage a long way.
Mariano's place is very well maintain, have a nice decoration and his father gave me really good information to eat around.
Everything was clean, towels and bed sheets shiny clean.
You're going to be at walking distance to Dante station and if you like to walk like me you will really close Via Toledo.