We had a fabulous time staying at Luz' spot, with all amenities (good internet, hairdryer, fans etc) and an ample amount of purified water. We had a late check-in when our flight got delayed and she was very accommodating, handing us the keys after midnight on a work eve! Really fast responses - when I informed her that the kitchen bulb was out, she immediately changed it out during the day while we were exploring. The neighbors do occasionally socialize into the wee hours, so I do recommend some ear plugs if you're a light sleeper.
The apartment was in a perfect location, close to the metro and Chapultepec Park. La Condesa is a hip neighborhood, akin to the Brooklyn and Shoreditch of big cities and very walkable, with an excellent supermarket Superama about a 5 min stroll away. Thank you for a very memorable vacation!