Our stay was very comfortable with Porto City Host's 1 bed apartment near Clerigos. We could literally see the tower from our bedroom window and the exit from the tower faced the bedroom window. The communication from their team is excellent and very prompt. The room was as per the pictures posted on AirBnB and clean. Enough fresh towels were provided for our 5 N stay. If you're coming from the airport, just take the 601 bus from the arrivals exit to Cordaria, its last stop and you'll be a few minutes walking distance from this apartment. From here, we could explore all of the old Porto sites as well as the wine cellars and the river on foot. Loads of wonderful restaurants and cafes are a stones throw away.
The only surprises were - firstly - although it says airconditioned, its in the living room, which has a sofa bed while the bedroom has a heater. Although we didn't need the aircon in the lovely Porto weather we got for all 5 nights, we couldn't keep the window open as some of the tourists can be really loud at odd hours on the streets. We asked them over a text if they could get us a fan and it was promptly delivered before we got back for the day. Once you close the bedroom window - both the glass and the wooden shutter, the soundproofing is great and we could get a good nights sleep.
Secondly - and this is something which we knew would have been difficult to resolve in the little amount of time we were there, so we didn't bother asking for it, but the flat needs to have some space to put your clothes. If someone is on a long trip (we're doing 16 nights in Portugal, 5 in Porto) living out of a suitcase can become a bit cumbersome. I would rate it a 5* place if only they could somehow resolve this for future guests.
Apart from that, it was absolutely wonderful, thank you once again Joana and everyone else at the Porto City Hosts. :)