First of all, the Apartment looks exactly as shown on the pictures, which is very nice. We had everything we needed. Check-In was easy.
Unfortunately the Apartment is not as central as we would have hoped. This "shopping street" is 10-15 minutes by foot, to get to an other sight in Porto you have to calculate at least 20-25 minutes by foot to get there.
The apartment is located on a busy road. With closed windows and by night, we had no issues to sleep but during the day it can be quite noisy.
Speaking of noisy, I have to mention the bed, which makes noises at every single movement while sleeping :).
Apart from that, everything was good. Communication with the host was good and fast and so was the internet in the Flat.