"The Blue Door on the Left" as I described it daily to Uber drivers, was a great and accessible place in Condesa. It's not quite in the heart of the neighborhood, and has some traffic noises (which mostly die down after 10 p.m.), but is ultimately a gem of the place. The top floor balcony is a wonderful place to unwind at the end of the day. The building is very safe with a 24/7 doorman and plenty of security features. It is centrally located, and very accessible to anywhere in the city. Walking places in the neighborhood at night felt safe as well. The 2.5 bathrooms were great too!