This property is designed specifically for airport travelers needing to be close to GRU - it is well designed and run for that purpose.
The staff are young and very friendly, and multilingual, and the restaurant staff in particular went out of their way to provide a great late dinner when I arrived delayed.
The rooms are small, but clean and comfortable, and everything felt very modern.
The only criticism is that if you have heavy bags, the hotel is a little far from the nearby train station, and sometimes the shuttle is booked out, so you may need to take an uber, but it was not expensive. The surrounding neighborhood is light industrial, so the hotel is fairly self-contained as a result, but they have everything a traveler would need for an overnight or short stay.
Getting into Sao Paulo takes a very long time (40 minutes uber if traffic is light, 3 hours if it isn't, and public transit takes about an hour to Luz station), so I wouldn't recommend this hotel if you want to experience the city's cultural and tourist areas, but if you have an overnight layover, or would prefer to spend a final night in a location that is less than ten minutes from the airport, this is an ideal option.