It's not an expensive guest house so we didn't expect much, but it turns out to be great. My best Airbnb experience ever.
We got a free upgrade from the host. The place has private room with bathroom. The whole place is two floor building, just for Sergio's Airbnb guests.
The host, Sergio, was really helpful before and during the whole trip at Rio. We saw him around and were able to reach him on WhatsApp for questions. He's a smart guy, had a lot travel experience, warm, talkative but not too overwhelming. We really like him.
Sergio also helped us connect with other guests at his place (and people who used to stay in his place), by inviting us to a caipirinha party at his home. The party is unforgettable, and is exactly why sometimes Airbnb is better than hotels -- you don't get much chance to talk to people from all over the world in a relaxed setting otherwise. Had we chosen a hotel for this trip, such an experience would not happen at all. (This is my first time having such a nice connection with hosts though, as sometimes Airbnb hosts are just hotel/hostel owners.)
Would give him a 12 out of 10 if 10/10 is just "really really good". :D