Mexico was closed down during our visit. I think the area was perfect in spite of that - only a short walk to the only 2 parks actually still open (Park Mexico and Spanish Park) which were lovely with good kids play areas and, oddly, never crowded. I think when the city is allowed to return to normal, this area would be really fun. Although, some visitors might find it too noisy - the flat is first floor above what would be a lively street and the windows look original - ie. the glass is thin and they barely close.
The flat itself was very spacious, although not as pristine as the photos made it look. Personally that was a plus for me. It's more relaxing to be in a slightly grubby space and that's kind of the point of not going to a hotel. Street food is just as convenient as room service! The temperature really falls at night though, so bring a jumper even if the days are hot.
We used a couple of great taxi drivers who spoke English and other languages. I'll pass their details on to the owner. I found the mosquitos a bit tiresome, even in the city, as some of the windows don't fully close, you'll probably be best to get some kind of repellent.
We had a lovely time here. I hope you do soon too!