The apartment is very clean, stylish, well equipped and has stunning views of the river Douro and Porto - beautiful at sunrise and sunset. It is a few minutes walk from the river bank and port cellars and restaurants and only 15-20 minutes walk from the main attractions in Porto centre. There is a small supermarket near the metro stop (around 5 minutes walk away).
Marcelo was very helpful and communicative and provided us with lots of tips on where to visit during our stay. For us, the only thing letting the apartment down is that it is on a busy road and is not sound proofed - fortunately I had some ear plugs with me so we used at night to enable us to get some sleep.