The apartment itself was great, clean, and tidy. One of the AC's didn't work, but we made do. There's wifi and a nice TV in case you don't make it out 5 steps to the beach, or are waiting for all your friends to wake up from the night before.
The apartment building is right across the street from Copacabana posto 2. Really nice during the day, easy to catch a cab. At night it gets a little sketchy, so just be careful of your belongings and be aware of your surroundings.
Lakini and her brother were really helpful and went out of their way to check us in pretty late at night since our flight got delayed. They even had some beers for us!
All in all, really great value for the location, and my friends and I had a great weekend in Rio!