That's a very good review above, which I agree with after a stay a week ago. I would also be very happy to stay here again. Here are a few more photos and pointers.

Room
My room was on the same 12th floor but faced into Avenue Rebouças, room 1202, and appears to be the other side of the corridor from the OP. The big difference is seing a full wall of skyscrapers - the original Concrete Jungle - from one side of the window to the other side, with the middle class villas, and St. Paul's British School, of Jardim Paulistano (Paulo's Garden) area in front. So an interesting view, but there was a small amount of traffic noise that made its way in - it wasn't too bad, particularly late at night. The window can open. The air conditioning was quiet and effective. I didn't notice any problems with the internet.



So even numbers overlook the Avenue, odd numbers overlook the area around the metro station, where many shops and restaurants can be found. That includes a 24 hr Carrefour supermarket.



And here are some more photos of the room itself





Breakfast

Was generally good, though given how cheap and good fresh fruit is in Brazil I would have preferred more options than the brand 3. There were more types of cakes on offer, though this is something that Brazil has carried over from Portugal and Italy. I also got a photo of the hot items. That's sliced sausages in the top right, cheese dumplings (pão de queijo) in the top left.





Other points

The hotel seems fully 220v, note that some European 2 pin plugs will be slightly too fat for the socket, the hotel will sign out adapters for loan during your stay.



I also used the Airport Express from GRU to Line 4 Yellow to Fradique Coutinho. At Luz the interchange is very easy and quick, just follow the very clear signs. However I believe it only runs hourly from the airport, on the hour. But it's so much better than the stopping service from GRU it is best to wait even if you just miss a train. The fare through to the hotel is only R4.40, which is under US$1. However they are not well set up to process international credit cards, just one machine set up for it and non intuitive, so you best have some Brazilian cash to hand to pay over the counter.

The hotel is operated by Atlantica Hotels, one of the largest operators in Brazil, who also run Marriots and IHG properties. It's virtually dual branded, with the staff wearing uniforms where Atlantica is more prominent than Hilton. I didn't have to fill in the whole registration card, just a few missing fields, but it was a more long-winded process than normal for the Hilton brand. No online check-in or digital key either, so I think this is an outcome of a slightly detached arrangement. It was similar at some other Atlantica hotels I stayed at elsewhere in Brazil.