We stayed for 3 weeks. I've been to Mexico City already a few times and I must say I think I've found my favorite place to stay.
You'll be close to restaurants, party, stores, everything. But you close the window and it'll be completely quiet inside! Do open it on Friday nights if you like Jazz though, as there's a band on one of the restaurants outside. You'll be within walking distance of Panaderia Rosetta, and you'll be able to grab their amazing Rollos de Guayaba and eat them on the rooftop of the building with an amazing view of the city. (Though you'll be within walking distance of so many cool places I won't be able to list them all!)
If you have any questions, or random issues (like I couldn't figure out how to turn on a light at first) they get back to you within minutes and they super friendly. If you stay longer than a week you get a free cleaning service. The staff at the building is extremely friendly.
If you need to work or have a meeting, they'll even send a desk to your place (though they only have some available)
Loved this place, honestly. Hope you get to check them out too.