My friend and I were visiting from the States and had a great time staying at Susana's apartment. It was cozy, clean, had wifi, and was located in a very charming neighborhood (reminded me of a Spanish version of Park Slope, Brooklyn). My friend was there to meet Susana and recommended some places to visit. She was helpful and communicative before and during our visit. There are some great bakeries nearby and a DELICIOUS cafe, Federal, right around the corner from Susana's apartment.

If you're from the US, a few things to expect that are different than the amenities of home:
No air conditioning, but you can open the doors to the terrace in the living room and the bedroom for a breeze.
There is a washing machine, and a line to hang dry clothing.
The shower is hand-held.

I would definitely recommend staying at Susana's apartment!