Great stay in Rio. The place is safe; the doorman will ask identification when you first enter the building. The door has a digital code lock, so no need to worry about carrying a key all the time.
The studio is very comfortable and felt very much like home for me. There’s high speed internet. There’s a bed, but the sofa is so comfortable you could sleep there all night.
The place in Copacabana is safe, about 10min walk from the metro station and a block away from the beach (3min walk). There are bars, pharmacies and a Starbucks, all within walking distance from the building.
I’d recommend this place to anyone going to Rio for leisure or business, either shorter or longer stays.