We had a good time in Mexico and the apartment is indeed close to the nice spots in Condensa and the easy access to the Chapultepec park. We felt safe and the apartment is well furnished and clean. BUT, IT IS LOCATED ON THE HIGHWAY (first floor) with 12 lanes of traffic just out the door. Perfect if you are deaf! Even with earplugs, we couldn't ignore the sound and vibrations of traffic.
If the sounds of the city don't bother you, then this is a great apartment (although smaller than what the pictures lead to believe), otherwise you might be better off somewhere else.