Location, location, location! And safety as well. This hip little rooftop room is great for a short stay. I actually spent a month up there, so it's doable! It is small, but it's really all you need if you are going to be primarily dining out. The kitchen is functional but you will run out of prep space quickly if you try to make your own meals.
The wifi, as others have mentioned, is spotty and slow. There was an issue while I was there but it was addressed quickly. I actually was able to get a few hours of work in here and there, answering emails and using the internet. If wifi stability is super important for you, this may not be your place.
As with most places in CDMX, there is no heat or A/C. The place cools off at night to a very comfortable sleeping temperature but during the afternoon it will be hot in your room. Make sure to have plenty of activities planned for that time! The fan provided was very helpful to get some air circulation.
Just about everything else is great. The rooftop is awesome to hang out on, do some yoga, or catch the sunshine for a bit. The hosts were very responsive, and the place was clean and tidy when I arrived and after the cleaning lady visited. Close to all three main parks, so that's always a plus. I would stay here again if the price was right.