I come to Mexico City often and have stayed at many different places and can hands down say that this place has been my best stay to date. If you're comparing different places, save yourself some time and book here.
The apartment is modern and clean with good living space. I stayed in the ensuite room for two weeks which has a nice comfortable bed, good shower and a desk which I used as home office during my stay. The kitchen is also nice and modern, with all the equipment you need, which means I was able to cook my own meals which was something important to me (this is quite rare in Mexico City).
The location of the apartment is in what I would say is in the best location of the city. It's in Roma Sur but also this specific part of Roma Sur has all the best cafes, bars and restaurants within minutes walk.
And finally there's Suzy herself. She's a really lovely and interesting person and I really enjoyed our chats while there. It was like staying with a friend.
Highly recommend!