Even though it said in the ad, I managed to overlook the fact that it is located at more or less the very entrance to a favela. I'm really glad that we did book this as the hosts were really nice and helpful, even if one of them didn't speak too much English and we little Portuguese or French, we managed with the help of Google and some primary school Spanish on our end :).
The airbnb looks just like the photos, mind you the doors to the room are sliding glass doors (not shown in the pictures). However there is a lock and we felt the room is secure as the hotel can only be entered by people with a physical key (and there weren't many there at the same time as us). AC worked fine and the internet speeds were perfect as I had worked for a couple of days. The pool-area was great and you get a wonderful view of the favela.
Copacabana and Ipanema beach are just a short walk away, and the area felt safe - however with Rio having the reputation it has, we always opted to take an Uber back when coming back after dark. There was a bit of noise (from the favela we concluded) a couple of the nights we stayed and had to use earplugs. The first two nights it was quiet and nice, so it really depends.
We book a pick up service through the hotel which worked great and they were very quick to reply on Airbnb beforehand and in person while we were there. Would recommend staying here if you are looking for something other than the chain hotels and away from the noise of the main roads/clubs.