We stayed with Alessandra for 6 days/5 nights this October and loved our time there. The apartment is situated on a well-trafficked street in Copacabana, with a number of stores on the same block where you can buy all staples.
Plenty of restaurants and the world famous Copacabana beach are just blocks away, the beach in particular is about a 10-minute walk away. You can also access Ipanema beach in just under a 30-minute walk.
The apartment looks just as pictured, and comfortably fit our family of four. It has plenty of supplies if you'd like to cook in the kitchen, and we did this most days. It also has a washer, which was very useful. I am also working remotely while abroad and found the internet to be very reliable. I was even able to hold a number of video conference calls. The main bedroom has a desk as well which greatly aided in my ability to work away.