Like most of the reviews say, you are staying there for the fabulous view! The location is close enough to all the actions, but as the hill is tough to walk a lot for us, with a stroller, we used Uber most of the time, and the Urber rates were cheap.
There was no sealed isolation between aparment units, so you can hear everything next door and downstairs talking. We were there during Carnival week, and the next door was a group of college boys. One night they got drunk and very loud, but once we knocked on their door with our 4 yr old, they were very apologetic and quiet down. As the ac units in the bedrooms were pretty loud, it kind of covered most of the noises when we sleep. So we didnt really have much issue.
The ac units in the bedrooms were nice and strong, but there was no ac in the livingroom. So, it could get hot in the hot days. Just needed to wait for the cool air to go from bedrooms to livingroom.
The host Marcello was very helpful and responsive. We would definitely stay there again if we go to Rio again.