Ernesto's place is fantastic! It it perfectly clean, with everything you might need for your stay. I cook a lot so the kitchen was perfect and fully equipped. Bathroom was big and clean. Lots of closet space to store your stuff if you're staying for more than a few days.
The location was incredibly perfect for me. Perfect distance to all of the Condesa/Roma things, to Parque Espana and Parque Mexico, to a great supermarket, and honestly anything you might need.
I highly recommend this apartment for your stay!