Hello, although this stay did not work out, the hostess took a fair approach. There was a very moldy smell in the apartment, which was probably due to the recent humidity. This caused me to have allergies. Although the cleaner could have noticed this smell and informed the hostess, the hostess had not heard about it, and no former guests had had this issue. When I let her know, she offered to let me find another apartment, and fully refund me for the days I had not stayed there.
So, of course, the apartment did not work as there was a problem, but I thought the hostess handled it well. She also said she would have a company look at the situation and try to remedy it.
As long as the situation/smell is remedied, I think the apartment is very adequate for a short stay. It's in a great neighborhood (Graça), very close to one of the city's best Miradouros, and and easy to get to all the sights downtown.