Monica's place is brilliantly located in Condesa, close to playgrounds, bars, restaurants, cafes and Chapultapec Park. It was a short taxi ride to the zocalo and other places we wanted to visit. The location is safe, and fairly quiet, considering it's street-side location.
There are 2 bedrooms with 4 beds, and plenty of living space. My boys (9 and 7) loved all the toys that were at the house- even those designed for much younger children - and this made the trip so much easier for us. Monica also left basic breakfast items for us (eggs, milk, cereal, coffee etc) so we didn't actually need to buy any groceries - we just fed the kids when they woke up, then went out. Little things like motion sensor lighting, and night lights made this perfect for our family. I highly recommend this place and will be staying here again next time we are in Mexico City.