Highly recommended.
I stayed at Tania's for 2 months and it was a wonderful experience. Tania is an excellent host that was responsive to my needs. As with any longterm stay, minor issues arose, but Tania was friendly and quick to offer solutions.
As for the neighborhood, Santa Teresa is lovely. If you walk 10 mins uphill you'll find cool restaurants and bars like Favela Hype, Portella, and Explorer. If you walk 5 min downhill, you're at lively Lapa where it's not uncommon to hear some samba or other local live music.
This apartment itself is spacious, has tons of natural light, a cute balcony where you can set up to work with a fantastic view of Rio, and it's an excellent value. The only inconvenience to some might be that you don't have shops and grocery stores a block away like you would in places like Ipanema, but overlook that because you're in Santa Teresa and you are obligated to walk through the colorful neighborhood's art, grafiti, architecture and cobblestone streets for 10 mins to get to those amenities. Even the Uber to Ipanema was scenic because you have to go along the rim of Flamengo and Botafogo, so you get a better appreciation for the city's topography.
Obrigado Tania!