We stayed a month here and we cannot recommend it highly enough. The apartment itself is great - spacious and with all the amenities you would need for a short or long stay. The building has an amazing roof deck and gym, which we used often. And the internet was fast and reliable if you will be working from the space.
The location cannot be beat. The street itself is quiet but in the middle of everything. We were able to easily walk and explore all of Roma, Condessa, and even further. Tons of restaurants/bars/coffee shops, 5 minutes to Parque Mexico, close to transportation, Mercado Medellin two blocks away, and even an Office Depot (for any work needs).
The hosts were wonderful - checking in frequently and providing great recommendations for what to do and see and where to eat. And they even provided weekly cleaning of the apartment.
We plan to come back to Mexico City and will definitely stay here again.