The apartment is located in the centre of Porto so you could easily discover the city by foot. Overall we were very happy with the apartment, everything was clean and stylish, there were only two small points to complain about:
1) it was good to know in advance that there was construction work ongoing in the neighboring building but we didn't expect it to be that loud - right now the apartment is only suitable if you leave in the very morning and come back at noon.
2) Due to our stay in late October it got really cold at night and nobody told us how the heating worked, so we had to find out ourselves that there was a small storage room (which you could barely enter) where we found two portable heaters that we then used.