I stayed here for two weeks in the fall. The room is nice, simple, and very well located, with hospitable people in the rest of the house.
The internet is a massive plus. I’ve never had such a fast internet connection in the US, let alone in Mexico City; if you’re really into working or gaming, and have your own mini-desk, this place works well for that.
That aside, the dog is not too loud, though you will share the patio with him. The shower is kinda tricky, and on the other side of the balcony, but works. And don’t keep open-air food in your room; I saw ants take up an interest at one point.
Be aware of those basic things and you’re in for a cheap, homey stay in La Condesa.