The neighborhood surrounding Gaby y Jaime's house is walkable, full of great little restaurants and not far from everything that you would like to do in Mexico City. We spent a lot of time in the evening at the many parks nearby with our three year old playing with neighborhood kids. My Spanish is mediocre, but i got by well enough. :D
My single comment isn't negative, but more of a general watch out for tall travelers, my husband and I are both tall (he is 6'4") and we didn't really fit into the beds here. This isn't any fault of the apartment, its just us giant Americans living in a shorter world. :) he ended up on the bed crossways and I ended up on the couch. I'm almost too old for that sort of thing, but not quite.
Thanks to Gaby y Jamie for being responsive, easy hosts. Also, every recommendation they made about the neighborhood food was stellar.