This apartment was very nice and we found it as described, though it would be tight for any more than 5 people to stay.
The location provides easy access to the Port Cellars of Gaia and World of Wine, and is about 25 minute walk over the bridge into Porto.
GuestReady was very communicative and helpful. At the time we stayed, the nearest key pickup was in Porto, which was a bit inconvenient but a managable walk down hill from the key pick up to the apartment.
Overall a nice stay in a clean, newly renovated apartment!