I stayed at Fatima's place for 12 days, and everything was well. Fatima was friendly, always ready to help, and great with communication. The apartment was clean and felt new, and had a nice view to the hills. I needed reliable internet for work and the WiFi signal was stable, about 8mbps usually but it felt enough. One thing I missed was the AC (I worked from home and spent the hottest hours of the day working) but if you're out for most of the day you'll be ok. There are 3 fans in the apartment and they do help.
The place is close to all of the nightlife in Lapa and Centro which is super convenient, but one thing to note is that it's outside of Rio's relatively safe Zona Sul. Be careful and do take an Uber when it's dark, I was a little new to Rio and had my phone taken at knifepoint when walking home from the metro.