The only negative I can think of is that the phone signal doesn't reach the apartment, so if you need to make or receive calls, you will have to stand almost at the exit of the building. To be fair, I didn't try calling from the small courtyards in the apartment. While the neighbourhood looks kind of unsafe, in reality it's safe until 11PM. Moreover, this neighbourhood is very close to a lot of the tourist attractions in Mexico city and is full of cheap taco stands.
Everything was a described, and Juan was very accommodating to my requests. He allowed me to drop my luggage before check in. The place was sparkling clean when I came in. Very short walk from bus stops and train station. For those who love riding bicycles, the apartment is at the edge of the allowed zone for uber bicycles.