I had a great time in this cozy apartment. It is at a very central place, such that you can get to many places just by foot. The apartment has a very modern look and a little balcony, where I had my breakfast every day. For people who want to take part in the night life: There are a lot of bars and restaurants close by, so you don't have to take a taxi or the metro to get home.
Miguel (the host) showed me many interesting places on my map, so I felt a little like a Porto expert, although it was the first time for me in Porto. Thanks again for that.