I enjoyed my stay in this cute apartment. Porto is such a great city to explore! It was a nice gesture to find a bottle of Porto's famous wine upon my arrival.
The location is central and great - walking distance to cafes, restaurants and most of the attractions. Porto has a great public transit system so you don't need a car at all.
I was here in July, and Porto was very hot! Not having AC in the unit was an issue. I should have checked before I booked it, but I just assumed they would have AC. But apparently a lot of apartments in Porto don't have it, so check the listing before you book it. This one doesn't have AC.
There is a standing fan in the bedroom, and that's it. This was one of the major minus points of my stay for me. You get fresh air and light from the windows, but there are no screens on the windows, so I found flies come in if you leave them open too long.
Another thing is that this apartment is managed by a company, and you have to go to another location a few blocks away to pick up the keys. If you want a host to come and meet you in person, it's 10 extra Euros!
I was put off by this, as when you're traveling with luggage, the last thing you want to do is to make an extra stop to pick up the keys. They really should not be charging extra for what hosts are supposed to do - give you the keys!
To me, Airbnb is all about the personal contact with the host, and this extra step I did not like.

Other things - The wifi worked well, and the kitchen is spacious, which I loved. There is a supermarket not too far from the apartment, so it was convenient.
If you are a coffee person like me, do make sure you get the correct size of capsule for their machine. I personally prefer old fashioned machines that take loose coffee, but they only have a Nescafe capsule machine, so if you need your coffee fix, make sure you get the right capsules!
Another thing is that the walls are quite thin, and you can hear everything from the apartment above, the hallway and the street. This was a bit annoying, and for this reason, and the lack of AC, I found myself working in wifi cafes most of the time.
The bathroom does have a bit of an odor - not overpowering, but not a pleasant smell either. I'm not sure there's anything they can do about it, but you might want to bring an essential oil spritz if you're sensitive to smell.
Overall, I really enjoyed my stay - it's an affordable spacious apartment in a great location to explore Porto.