Myself and three friends stayed here for 4 nights. The apartment was excellently situated, in a nice area - just a few minutes walk to the main shopping street and close to Ribeira.
The apartment itself was located on the top floor so required lots of stairs to get to the top. The apartment was very clean and had all the necessities. The beams on the ceiling are very low towards the sides so taller people need to be careful not to hit their heads!
Communication with the host was great and they even arranged a taxi for us to get back to the airport - I would recommend this as the taxi service was very efficient.
I would definitely recommend this apartment for anyone staying in Porto! Thank you :)