It was a pleasure to stay at this place as it was very nice and we had 3 sleeping rooms (which was important for us as we were 3 guys). In the kitchen you had even salt, pepper, vinegar, oliveoil and coffe and also stuff for cleaning the dishes - something in a lot of apartments is missing and you have to buy.
Also the locations is great - a couple minutes walk and you`re at the riverbank of the Douro or in the buzzling nightlife area but the apartment itself is superquiet. So definately worth to go!! (and Porto is super!)