I stayed here for a full month during Carnaval with a friend of mine. I was working remotely the entire time so wifi connection was really important to me as well as a nice work setup. In the main bedroom, there is a desk that folds out from the wall which was perfect for what I needed. Wifi was also good the whole time. The only little thing was there was some construction happening outside of the apt during the day sometimes but I believe it's a temporary thing and won't be happening much longer!
Kitchen amenities had everything we needed and we cooked quite a bit. The place is super cute, the bedrooms have AC as well as the living room. There were lots of extra towels, some linens, etc.
The location is about ~15 min walk from the beach and in a quiet part of Copacabana while still being close to things which I really enjoyed.
Anfitriao was super responsive and checked in with us often to make sure our stay was great.
All in all, would highly recommend staying here! :)