I wholeheartedly recommend Juan Pablo's place for your next visit. Juan Pablo and Tania are the kindest, most responsive hosts you could ever ask for. The wifi is fantastic, absolutely no issues over the course of a month.
The location is extremely safe and close to Condesa and Roma Norte, both easily reachable by walking a few minutes. Within 20 minutes of walking you can reach 80% of the things you will be visiting in Mexico City. Within 20 minutes of the subway or public transit bikes, you can get to the Historic District. Within seven minutes there are a number of restaurants such as Lardo for you to eat at close by, and the menu of the day at the nextdoor restaurant Rico Sazon is good if you want something quick, cheap, and local.
The best part of the location if you are a night owl is the street vendor Tacos Los Juanes, which is regarded as the best cart in the city. It is merely a three minute walk. It opens after 8 p.m. and basic tacos are ten pesos.
The place is of substantial size, the living room is very large with an oversized closet and a comfortable bed. There is ample sunlight in both rooms. There is a new screen in the bedroom and the balcony and the curtains are very nice.
The bedroom is well-equipped and although I read some complain about the comfort of the mattress, it seems like there is a new mattress with a memory foam topper there and it is quite comfortable. There is a fan, space heater, and electrical outlet in the bedroom.
The shower gets nice and hot quickly. The gas did get knocked off a couple of times but both times Juan Pablo or Tania fixed it within minutes.
I didn't use the kitchen much but there is everything you need for simple cooking, tons of kitchen gadgets, a number of burners, a spacious refrigerator, etc.