I stayed for three weeks at Rio Antigo while attending a Portuguese language course November-December 2016. The house was just as lovely as Paloma describes. Safe, cozy, nicely equipped and tastefully decorated. Loved the veranda.
Paloma was a generous host meeting me punctually at the house on the day of arrival. Otherwise we kept in touch via whatsapp.
I knew Santa Teresa from my previous visit, but I had never stayed there. The hilly Santa Teresa is very unique place for a Rio visitor. If you are looking for an other option than a beach location, this is it.
I loved waking up up in the hill and making my way down to Centro with other commuters on the bondinho.
You should not be concerned about the location. It felt safe and not at all isolated. The bonde and three bus lines connect Santa Teresa to the rest of the city practically from the doorstep.
For instance if you are heading for the beaches, the bonde and two of the bus lines connect you to the metro at Carioca.
And for the nightlife, Santa Teresa itself has several offerings especially during the weekends and Lapa is just down the hill. For the night commutes, taxi is advisable. And taxis are cheap and available everywhere in Rio.
I would definately stay here again.