Very clean and cozy place!
Its very good ubicated and there is not only a lot of places to visit near the apartment, there is a lot of nice places to have breakfast or brunch too, to relax or while you are working.
Very good host and very good attention, which treats you with detail!
There is some points to improve, like having some soap for dishes, but thats totally a minor issue. I recommend it, a lot if you are travelling alone or as a couple. We (I talk now as me and my partner) will repeat if we can stay in Porto again.