If you take cleanness as a big matter, this house will be uncomfortable for you. There are 7 other rooms except for your room, and more than 10 people are living in this one house. The flat is always crowded and noisy since some of the residents keep inviting their quests to this house, so it can be difficult to use common space as you want. The entire house is dirty. Even though they clean it every day, the house is filled with a nasty smell like wastewater. This is critical because your room will be on the underground floor, so it is very humid (even underwear never drys perfectly) and that floor smells the most in the house. And you'd better not expect to use the kitchen because people living in 7 other rooms are the actual residents, so the fridge is always so full and smelly that you barely use it. Also, you will share the old, stained few kitchen utilities and a washer with all people in 7 other rooms, and this means it will make you feel similar to staying in a student dormitory. There's no soundproof, but there is a lot of noise from early in the morning to late at night. My bed linen was stained and had hairs from the very first, but you can ask the host to change it if you want. The smoking spot is right in front of your window, so if you are non-smoker, it will bother you because the smoke comes into the room through the window gap. The bathroom door, which is difficult to be locked, is still remained out of order for 2 years.. and a toilet was broken while I'm staying here, and the odors sucked. The city center is 30 min by walk, but keep in mind that the Porto has a large slope. So you'd better take a bus or you will get leg pain. And most of all, people issue is the most significant problem, because it is inevitable during your stay. There is a kid and he spitted on my face, took away my stuff, tried to get into my room, and beat me, but no one was in charge of him so I spend really hard time during the stay.
If I were a tourist in a short duration, I would probably bear it and just leave. But I made a reservation for over a month, so I couldn't decide to bear it for such a long time. Thant's why I canceled this reservation in the beginning of my stay. I only wrote the facts, so take my comment as just one opinion of the experiencer. Lastly, the host kicked me out right after I asked her for cancelation, and I still didn't get my money back yet. If you consider this room as accommodation, I hope you don't have an experience like me.