When we arrived, it smelled strongly of mold, which made us very uncomfortable, as my friend is allergic to mold in houses. Fortunately, the provider responded quickly and offered that we pay only the first night and get the rest refunded. That was quick. Despite this, the high humidity and no air conditioning / windows in bedrooms and bathroom is a problem.
The apartment has two bedrooms more than the listing says and the terrace has space, but does not look at all like the pictures. The kitchen was well equipped and the internet was very fast.
The location was in the historic old town of Porto, which can be good. However, we liked it better after changing to the more modern area around Balhao.