Maria's place on Rua dos Mercadores is in an ideal location: it looks out onto the lively Rua do São João, and is not at all far from the number of parks, museums and sites on its side of the Rio, such as the Palácio des Artes. But neither is it far from the other side of the Rio! The bridge across is a stones throw away and my parents and I visited the other side a number of times too (nowhere is very far!). The apartment itself was well equipped and very comfortable - the beds were a case in point. Maria says there is a limit to the capacity of the hot water tank for the shower, but between three of us we had no trouble having normal length showers, so there weren't any issues at all for us. In addition to all this Maria offers a taxi service to the airport at a fixed rate of 15 euros, which is much cheaper than other taxi services and more speedy and comfortable than taking the metro - plus we had a lovely driver! I highly recommend a stay Maria's place in Porto.