Nice clean place, fairly quiet, 24-hour security guard for the building so you will feel safe. Love the neighborhood and you can walk to 50 different restaurants. Great location.
A few minors nitpicks:
1) The patio was a bit dangerous because people from above throw stuff off their balconies, sweep trash or wash off their balcony (perhaps it's the maids?) and it all lands on you (water, garbage, etc.). My wife was enjoying the sun on the patio and was drenched in dirty water…and was not too happy
2) The people directly above have dogs that bark...all the time, when you enter the building, when you leave, during the day, late at night, in the middle of the night, when the owners are there and when they are not there. I was lying in bed fantasizing about shock collars to train them not to bark (really, it wouldn't be that hard). If you don't like barking dogs...you won't like this place. In fact, apparently everyone in Condesa is in love with dogs and you see them everywhere, which is fine, but often they poop on the sidewalk, roam unleashed, and many owners don't clean up after them. That's the only downside of Condesa. It's a safe area with wonderful restaurants; probably my favorite area of the city besides Polanco) you just have to realize it's populated by people that love love love their dogs even more than children. I personally love dogs, but it was even getting a bit on my nerves.
3) No filtered water in the building and no bottled water provided. This is the first time we've stayed in an Airbnb in Mexico that didn't either provide filtered water (new buildings generally have this) or provide the large, filtered water bottles. Not a big deal but we were surprised and we've stayed in Mexico many times.
4) I wouldn't try to pack more than about four people in this Airbnb. You could technically fit 5 but the first room with the foosball table allows light in from the hall through a frosted glass window and there is no way to darken the room and the hall lights are on all night. I don't think you'd want to sleep in that room.
5) There are no blinds between the bedrooms and the patio which means when the folks upstairs have their balcony lights on...your room is full of light (yes, the people with the barking dogs). One night they had their lights on until 1am so we had to sleep with the covers over our eyes (didn’t have sleep eye masks). Also, as soon as the sun comes up, your room is light.
6) No toaster and no electric tea kettle. Why not spend $20 on a toaster and electric tea kettle? It’s a small thing but my wife would have appreciated these minor conveniences.
I mention all these things for full transparency. None of them really bothered me but they did bother my wife and I think she will choose a different location the next time we visit Mexico City. I do love the area, the security of the building, and all the fantastic restaurants nearby so if it were me traveling with friends, I would choose this place again. I love the modern style, large bedrooms, location security, large closets, lots of high pressure hot water for showers, etc. I just mention those minor inconveniences so you know what to expect.