We spent a wonderful time at Teresa's place. I highly recommend it!!
The location is superb. It's one block from Arpoador beach, one of the most beautiful beaches in Rio that has great waves. It is really good for beginners during the summer. It's also just three blocks away from Copacabana's beach and the fort of Copacabana. You do not get bored with that! The neighborhood is safe and there are many inexpensive food options around. Try finding the best açai (Balada is my option). It does feel like a neighborhood which is nice.
The building is great. The doormen are people that you can trust on. Perhaps the pictures do not show it, but there is a rooftop with a great view! You just need to take the elevator to the tenth floor and walk up the stars.
The best thing about the apartment is the views of the ocean from every room. I was working from home and it was really pleasant to see the ocean from my working station. There are also three good ACs in the apartment so we did not feel hot during the summer. The place is super cozy, clean, and has a nice beach-city style. We had all the utensils we needed (including three different ways to make a coffee). We spent a month there and we had everything to cook, etc.
Overall we had a great time and we recommend booking Teresa's place