I didn't have the chance to meet Sacha because he was away during Easter time, but his friend Lucía greeted me and explained everything perfectly. I also got great grocery tips from the French kid next door. Anyway, Sacha was always in touch and made sure everything was OK. He even stopped by almost every day to make some repairs in the apartment and check everyone was doing fine.
If you like to walk, you can be in Sao Bento station in 20 min, or you can take the bus round the corner, or the metro (10 min walk).
The room is spacious and bright. The bed is comfortable.
I think it would be fair to clarify that the shower is shared with the other three rooms in the apartment and that, because of the continuous use of hot water, it may be scarce at night.