Hector's place gets a 5/5 in every category for us. Condesa, for us, was the perfect neighborhood to stay in. What everyone else here said is spot on, clean, convenient, quiet (in Mexico City and it was quiet!), nearby good food, bars, groceries, pharmacies, and an easy Uber ride away to anywhere. Chapultapec, the big park is about a ten minute walk away (through some heavily trafficked streets but that was part of the adventure) and stroll through there on a weekend day is highly recommended. Do NOT miss the Anthropology Museum, that's an order.
The apartment was accurately represented, large enough for a couple, stocked perfectly for our stay, at least, and enough amenities all-round to make it feel like home.