This place is an exceptional value in the perfect location. I would absolutely stay again!
A few things to note: This apartment is noisy. Even from the 4th floor with the windows closed, you will hear people talking on the street, trash collection, and construction (and all of Porto is under construction). Pack ear plugs if you are a light sleeper, or have any intention at all of sleeping in. The yellow bedroom gets very hot in the night. Expect to sleep with either the window or the door (which opens to the blue bedroom) open.