We loved this big, bright & nicely decorated flat. It's perfectly located in walking distance of practically all the sights. There are also very good restaurants in the parallel street.
We had a very warm welcome by Marta, who showed us everything & gave us lots of tips for Porto [Restaurants, sights etc.]. It was also very easy to stay in contact for more tips and questions.
I definitely would stay here again & highly recommend it to everyone else.