I had the best stay I could ever had for my first time in Mexico city!
Cuauhtemoc was available whenever we need and provided us the best tips. The location is very good, near Cafe La Habana (a very historic and famous coffee) and very good restaurants (such as Amaya), one block from Ciudadela (a big market of mexico´s souvenirs). Also, there is a square 2 blocks distance where, every saturday, people go to have dance classes, very interesting.
At his house, there are many books about Mexico in several aspects and the coffee center is very good too. The kitchen is equiped with everything new. The beds are very comfortable.
I would definitely recommend this place for your stay in DF.