I stayed in Carolina apartment in Ipanema for 5 days with my girlfriend and her aunt.
I rather start with the negative comments since they are just a few: the shower water heater is very powerful so it's hard to control the water temperature (too cold or too hot), also the shower drain seems to be clogged so showers need to be fast before water level reaches the bathroom floor. Internet didn't work but we're able to connect to other apartment net, so it was ok.
Now the good stuff, very well located the apartment close to restaurants, supermarket around the corner, the metro station right in front of it, in case you like walking you can go to Copacabana and Ipanema beach. It looks just like the pictures, new and clean. The building staff is very polite, supportive and reliable.

The overall is a good deal!!! We had a great time and we're looking forward to come back sometime soon.

Thank you Carol, and best regards!!!