We stayed 10 days in the apartment and we enjoyed it a lot! The location is excellent, metro station is only 5 min by walk. There is a big supermarket in the building, where you can buy everything what you need, included also Porto wines. ;)
The apartment is a lovely and cosy modern studio. It offers all amenities and it has a nice view from the balcony.
Moreover Luís is a great host! He is very friendly and helpful. He gave us plenty of recommendations/tips, what to do in Porto to make our stay very pleasant.
Highly recommend this place!