I recently travelled to Rio together with my three children (two teens and an eight year old) and stayed here for a week. We had adjoining, family-style rooms that were very comfortable and well appointed. Our experience was exceptional and started before we even arrived. I chose this property because it appeared to be in a safe neighbourhood, located right across from Olympic Park, and was great value for money. One of the kids needed access to a rowing training facility, and staff at the hotel went out of the way to find both a nearby gym that has rowing machines, and also arranged for her to train at the same rowing club that hosted the Olympic rowing events. All of this was arranged pre-arrival via email by one of the hotel's staff. We had an amazing check-in experience, and front desk staff again went out of their way to help us book a guide and tickets to a soccer game at Maracana Stadium (an amazing experience). On our last day, the hotel allowed us a late check-out at no additional charge. The rooftop pool is absolutely stunning, and they have a great gym as well.
Notes - be sure to have birth certificates, notarized consent letters and any other documentation you may need if you're traveling with children. The hotel is about 12 km from the closest metro station so be prepared to use the rapid bus system, taxis or Uber to get around. And the hotel's restaurant is a bit hit and miss.