I had a great two weeks exploring Mexico City while working remotely from The Brit. The best things were the staff (so friendly and helpful) and the location -- Juarez is central, near everything (walking to Condesa and Roma but not as overrun with foreigners), and every shop or service I needed was nearby.
The apartment had fast wifi that was never a problem while I was working, full of light, looked out on to treetops and skyline, and the rooftop terrace is a highlight. I felt safe thanks to the 24/hour security and front desk and how busy and lively the streets right outside were.
Being so central, the noise factor is real, even from the 5th floor. Manage your expectations and have earplugs and it will be fine.
Thank you to the staff for their kindness and help!