I would NOT recommend this unit to anyone who would like to have a good time here in Porto. Here are the reasons:
Noise:
The apartment was quite noisy as the walls are not very thick. The neighbors were constantly arguing and talking loudly which could be heard in the flat. It would not be a problem if the wall is thicker, but unfortunately, the wall is really thin that you cannot ignore these noises.
Right beneath the apartment there is a laundry shop, which also runs at night, and the noise (incl. the music the lady was playing/ singing along) can penetrate the wall and we had to ask the lady to lower the volume two times (and that was mid-night). There is also a constant smell of detergent from this laundry shop which you can smell in the apartment. Pictures of the windows with a lot of mould and leakage are attached.
Additionally, the wood floor and the door handles are also very old, so every time no matter how hard I tried not to produce any noise at night, it was impossible. My friend was staying in the living room and he suffered the whole night.
Toilet smells/ cleanliness:
The toilet was clean when we arrived, but as the ventilation was terrible, it smelled very bad like a public toilet. We tried to open the door, but the smell also went into the other areas of the apartment.
We also tried to turn on the ventilation for some time even though we were not using the bathroom, but it did not work. Moreover, the ventilation also produced noise, so at night it just added additional noise.
We tried to raise this issue to the host and asked for an air refreshener, but the message was strictly ignored.
There is a big glass separating the shower area, and there were plenty of black molds on the plastic holding the glass. (pictures attached)
Key pick-up location:
Porto is a rather hilly city, so you could imagine if you need to navigate from one point to another with a suitcase could be a challenge. The host offered a few different spots for us to pick up the key, and we tried to select something closer to the apartment. However, as the city is hilly and the road is also quite bumpy, that was certainly not an easy task.
However, in case you would like to ask somebody else to give you the key at the apartment, an additional charge of 10Euro will be incurred.
Supplies:
The sofa was offered but no blanket was given. We were trying to look for the blanket in the house, but apart from 6-7 additional pillows in the closet, nothing could be found.

It was big enough for a person or two. However, it was really uncomfortable. For sure, we were not looking for the best sofa, but it was really bad, and my friend had back pain the other day.
Indeed, a blanket was sent to us the next day after we asked, but as we checked in after 18:30 on the first day, they should have plenty of time to prepare.
There are also two hairdryers in the toilet, however, none of them worked. I have only tried them in the bathroom, perhaps they worked but the socket was not. Either way, it definitely indicates that the apartment was not really well maintained.
Review:
I believe the host probably also noticed what bad experience they offered to us, so as soon as we left the apartment, someone from the team sent us a message “suggesting” that we could send them our comment privately. I seriously think this is way out of line, as the other people who want to have a good time in Porto should know what they are getting.
These are my comments, and indeed the apartment looks like how it was advertised (based on the images), but please try to imagine the noise and smell that you are going to enjoy during your stay.
All in all, unless you are documenting some terrible Airbnb experiences or your life is too perfect and you would like to experience something bad, otherwise, I would not like to ruin my holiday by renting this Airbnb.