Great location, very functional and quite pleasant apartment, and good value!
The place is close to the old town and within walking distance of many shops and a big supermarket; it is quite charming, comfortable and well-laid out, was pretty clean (not spotless but nothing major) and well-appointed (though a fresh soap or shower gel and shampoo would have been a nice touch).
Overall a great value. I would stay there again if I go back to Porto!