We had a lovely stay at Gaby's place! Both her and Diego (who live in the same building as the listing), were very friendly and accommodating of us during our stay. They were also able to provide a hairdryer for us during our stay, which was super nice.
Location-wise, this place is great value. We were close to Polanco, Roma Norte and Condesa (all about a 10-15 min Uber away and cost about $2-$3 USD). The airport was only 20 min away and the historic center was only 20 min away as well.
Safety-wise, we always felt super safe. Most of the people who live in that area appear to be residents, and we felt comfortable walking back later at night and in the early mornings.
Noise-wise, this place was so quiet! Mexico City is a pretty loud city in general, but this place is very quiet and residential and we were only affected by construction noises on the last day we stayed there, but those mostly started at 9am and ended within 2 hours.
Just a note: there is no A/C in the apartment, but Gaby provided a fan so we were able to not overheat. Mexico City is relatively cool, even in the summer, so we weren't too affected by this but it is something to be aware of. We also opened the windows when it got too hot, but there were quite a few mosquitos and both me and my partner bit quite a lot, so just be sure to bring bug spray! (I believe this is a common issue in most places in Mexico City).
Overall, we enjoyed our stay and felt like this was a great place with value!