We loved Alejandra’s place and La Condesa. We would definitely stay again. It is really big and very comfortable. La Condesa is superb and great for families. There is no downside at all though be aware that Michoacan is a busy street and a couple of the nearby bars go late into the night. However, it wasn’t a problem for us or the kids. If you are sensitive to that, earplugs would do the trick! But what a great area to stay - just a 50-100 peso taxi ride from everything or a 5 peso trip from nearby metro stop Patriotismo. Alejandro always responds quickly to questions and her cousin Alejandro works in the building and is really helpful.
In short, the apartment is great and Mexico City is awesome.