I don't think the photos of this airbnb did it justice tbh, because it really was spotless, very well built, modern and clean, yet cozy. there are split units that can be used for heat and cooling. the location is very central, less than ten minutes walk to the Sao Bento train station. we had a very good and relaxing time staying here.
one note on the tunnel that another customer commented about. there definitely was some shady activity going on in the dark tunnel that leads to the apartment. not dangerous per se, but if I were alone I wouldn't feel comfortable. to avoid that, I recommend going the other way. it might be more round about, but at least you avoid the tunnel, which again, isn't very well lit at night.
otherwise, my husband and I had a great stay. the toiletries provided were very handy and a great touch, and the hosts were very communicative.