First, the location is incredible. Roma is fantastic. The apartment is next to cafes, parks, restaurants, and bars.
Secondly, Luis is probably the best host I have had with Airbnb. He is so friendly and communicable. He got my wife Medicine when she fell sick, took me to taco stand, taught us about the area, and shared his breakfast and coffee with me. I cannot say enough good things on behalf of Luis.
Lastly, the accommodations were clean, and comfortable. He also makes the guest very aware of the conditions before booking.