We've stayed in Arturo and Horacio's place for 1 month and it is truly a home away from home. They're such warm and welcoming guys, going above and beyond what you'd expect, you honestly couldn't ask for better hosts. They live upstairs, and their house is accessed through a separate entrance. Anything we needed, they'd do their upmost at the drop of a hat. Such cool guys to hang out with, too. They even got the room next door to ours ready for a family visitor, worked out perfectly.
And let me tell you, the place is just wonderful. It's as beautiful as a lux room in a boutique hotel with walk-in closet, lush bathroom and private kitchenette. There is also a fully equipped kitchen with gas hob, microwave etc. and a lovely outside space with sofas. And I wish I could take the bed with me, sooooo comfortable! Back pain from many months of backpacking - gone! Weekly cleaning meant it was absolutely spotless, too. It's by far the nicest place we ever stayed in during our travels.
Location-wise, Condesa is where you want to be in D.F. It's quiet yet lively, endless amazing food options, a big supermarket right next door, Ecobici station right outside, 10-15 min cycle to most of the city's main sights, around the corner from 2 parks as well as Colonia Roma, the new up-and-coming trendy spot. If this place is available right now, book it!