Very clean, cute apartment that's great for the airport, the historic center and the Palacio de Bella Artes. The whole building is well designed with a lovely roof terrace with a great view over the city for evening drinks. Check in was a breeze and the building security guards friendly and competent. Importantly, the bed was firm and provided good support. There's also lots of storage, a convenience store next door and plenty of Uber drivers nearby.
There's only a few caveats - there's not much in the area for food and drink, and at night I wouldn't recommend walking around alone if you don't like being stared at. It's very much a working class area, which is great for shopping during the day and getting a feel for everyday Mexico, but the streets nearby are virtually empty at night so tourists stick out line a sore thumb.
Also there's no AC, so you may want to open the window to get some air. However, there's a lot of traffic nearby and constant loud music so light sleepers beware. It's totally not a problem if the windows stay closed. Overall the apartment is great value and as a bonus there's a wrestling venue 2 minutes walk away - great if you want to catch some Mexican lucha libre!