Location: very close (walk distance) to many cool neighborhoods and cool tourist spots. Museums, Zona Rosa, La Condesa, Roma..this place is right next to all of the places you want to visit....and it really is very walk friendly. Not to mention the Starbuck across the street.
Place itself: there were two of us visiting and we found the space more than ample to hang, entertain friends, and relax. There is one large bedroom and one smaller guest bedroom (two beds in total and a couch in the living room). It can host two couples easily and then some. The dining room has a large family style dining table and is a great anchor for the place.
Justyna is a very attentive host and replies immediately to all/any questions you may have. We loved our stay and if I were to come back (which is highly likely), I would greatly consider it.
It's especially a good place if you have an extended stay (+5 days).