Watch out: I had a lot of issues with this room. It's definitely not a good choice in my experience, I don't recommend it.

1. Issues with payment of extra days.
I'm a young but very experienced Airbnb traveller, with 30+ Airbnb travels and stays. I have never been treated like I have been here with extra days payment.
I told Guilherme that I wanted to stay two more days and he said it was fine. A couple of days later he asked me until which day I wanted to stay. I had just waken up and I told him a wrong day (21st Feb instead of 20th, so three nights instead of two). Then, I tried to cancel the "reservation" for the last day, telling his girlfriend that I didn't need that because I already had one accomodation from the 20th, I just got confused. Well, Guilherme didn't give me back any money, that's something that really struck me: it was only a bunch of reais, but it's not fair to make a host pay for a night he didn't spend there.
This made my Airbnb experience very unpleasant: I always make new friends while staying at other people houses and if there are money issues we always find a way to solve them, but with Guilherme it was really impossible. That was sad.

2. The room is not really private.
Well: the room it's their living room, but they actually live there, sometimes eat there and leave their stuff there.
I was sleeping at 11.30 PM and they came here to eat and drink. I have never experienced something similar, it's not professional at all.
Then: when I was there, I couldn't close the door to get some privacy. The door for my room couldn't be closed. This is not fair: they ticked the Airbnb option "door locked for your area" (I'm translating from the Italian but it was not true when I was there.

3. Other issues
Rain inside: the windows are very bad. When it rains, the rain comes inside, right on your bed.
Wi-fi: The wi-fi rarely works, it stops every two minutes. I once tried to make a computer call (no video) and the connection couldn't make it. All Brazilians houses, apts and hotels have 20+ Mb connection, this one didn't let me call via my computer
A dirty place: my pillow had brown shadows, it was clearly not clean. There is dust everywhere.
Noise: sometimes Guilherme and his girlfriend make too much noise. They tend to have showers late while listening to music.

Brazil is a wonderful country with magnificent people, this place is definitely below average.