This is my second stay at this apartment. It's best qualities are it's location (walking distance to both Roma Norte and La Condesa), great city views from the outdoor balcony and there's a shared washer/dryer down the hall, decently stocked kitchen, and good wifi). Also, there are so many great food options close-by. The Metrobus Sonora stop is a 5 min walk.

Yeah, it's located on a busy street, but it is Mexico City. The apartment is 5 floors up, so that along with a pair of earplugs both help with the noise. I'm a light sleeper and have had very little problems.
The hosts are very helpful and responsive to any questions and concerns I have had. And, the security staff downstairs have always been very friendly. I have always felt safe if that's a concern to anyone reading this :)