Location, location, location! Elivia's place is in a bustling area in Condesa where you can access the best restaurants and coffee shops. It is 30 minute walking distance (and it is a nice walk) to the best museums in Mexico City such as the National Museum of Anthropology, the Chapultepec Castle, and the Museum of Modern Art. Just walking around the neighborhood will make you so so happy!
Security: the building has a 24 hour doorman. So, this is an incredibly safe building.
Comfort: The living space is really nice. It has a sectional, 2 lounge chairs, a large dining table, and several stools around the kitchen counter. There's a smart TV, so you can watch Netflix and YouTube if you want to chill after a long day. The bed is very comfortable. The only issue is it's a bit short. So if you are taller than 6 feet (182 cm), your feet will stick out.
Noise: If you are obsessed with having a quite space, you will notice that it is very difficult to find a completely quiet apartment in Mexico City. Despite being on a bustling street, this apartment faces the back, which means less noise. But be aware that it gets noisy on the weekend. I just downloaded a white noise maker on my phone and had no problem sleeping (and I'm very sensitive to noise).
Bathroom: There are two bathrooms in the apartment with a toilet and a shower in each. A common issue in Mexico City is the lack of water pressure in showers. Elvia went around this problem by installing rain shower heads. It doesn't have a lot of pressure but it does the job properly. My only issue with the bathrooms were the small size of the sinks. It is difficult to shave and wash one's face without splattering water all over the place.
Overall a great stay. I definitely recommend staying at Elvia's apartment. I already referred a couple of my friends! :)