This one bedroom unit is in a very nice and safe building close to a metro stop, Chapultepec park, and the Condesa and Roma neighborhoods. The host is very friendly, wonderfully responsive, and offers great suggestions for your stay. The unit is clean and modern and the bed is quite comfortable.
Unfortunately it's also directly on top of 12 lanes of highway which means it's incredibly loud at all hours of the day. There's also no air conditioning and the only windows face due west out onto the traffic, so the options were to sweat and be very hot and uncomfortable, or to have windows open and be unable to hear each other talk and have the smell of all that traffic.
The place is a great price, so the value is good, but go when the weather is cooler and only if you can sleep through noise.