Wally's apartment is in a wonderful central location. If you turn right out of the door, you have a 3 minute walk to the metro where it's a short ride to the Gothic area, or train to Monserrat. The metro is very easy to navigate, even for non-Spanish speakers. There is also a "hop-on-hop-off" bus that travels by the metro station.
If you turn left out of the door, it's a 5 minute walk to some lovely restaurants. And right across the street there is a wonderful bakery for breakfast treats.
The apartment is sparkling clean and very comfortable. We were a party of four adults and having two bathrooms was a real plus. The kitchen is set with dishes and utensils, and has a coffee maker and micro wave.