The appartment is in the old center; only 30 meters from the river, in the middle of the touristic hotspots. Very convenient if you want to have lunch/dinner at the river and don't want to walk a lot.
The place is good value for money. It looks a bit shabby here and there, but taking into account the price it is a good deal!
We felt the bed not really comfortable for two people, but I can recommend the couch!
A great thing to do and experience Porto is to take a bike ride to the west coast, both north and south of Porto.