My time at Edoardo & Adriana's (and Filippa, she is there and she wants you to notice it!) was lovely. The house is big, well kept and fully equipped with anything you might need or think of.
The guest room is nice and quiet, perfect if you need to work or write--it has a desk with chair by the window. The bed is wide and comfortable, with plenty of cushions and pillows, all in excellent status. I did love the private bathroom, which is fully equipped also with courtesy toiletries, and the wide closet where I could store all my stuff, including the suitcase.
When in, I enjoyed having breakfast or lunch in the little patio, doing my Internet with just the sound of the singing birds. I have lived in Mexico City for a few years before so I know how unique this is given the location of the house. Indeed, it is very conveniently located, just behind a busy avenida with taxis and buses running all the time. But you can actually walk to local attactions like Coyoacán, go through the little streets, lovely houses and huge trees of this 'barrio', which used to be a village on its own.
As for the hosts, they are very attentive (for example, when the weather changed, they immediately offered me an extra duvet or a fan, depending on the temperature) and friendly, but also very discrete, so it's up to you to spend some time with them chatting, maybe around a glass of Italian wine.
I would recommend this place to solo travellers as well as couples.