Porto is a beautiful city and you will get your cardio training in with the hills you will walk. That being said Carlos & Christina's place is in a great location. You are a relatively short walk to everything. The apartment contains everything you need. The apartment is on the third floor so if you have trouble with stairs you should look elsewhere as there is no elevator. On our journey we took a city tour which was a great way to get our bearings. After that we walked everywhere within the city. There are also trolley's and a very good bus and metro system close to the apartment. You are close enough to everything you need via a short walk but you are in a neighborhood that is peaceful. If you're going to Porto, you should seriously consider staying with Carlos & Christina!