We had a great stay in Condesa! The apartment is modern, clean, has everything you need, and is in a great location. It was the perfect base for exploring CDMX. Also has lots of desks for working, if that's your thing. Wifi worked great, coffee and purified water provided as well, which was nice. Numerous TV's that worked well. Check in process was smooth and easy; security guard downstairs was very helpful.
(A couple of notes: the bedrooms are in the back of the apartment, and don't really get any natural light, but they're for sleeping, so who really cares? Also, the street is fairly noisy, so we didn't really sit on the terrace, but it's there if you want it. But these are very small qualms; still a five star rating!)