Great place to stay when you're visiting Porto. Location is awesome (close to most of the hot spots), spacious and clean appartement and very good communication with the host.
If you're by car, it can be a bit hectic in the street in front (during the day). But there's a great parking space located at the river (2 min walking) where you can park for 20 euros for 3 days. Make sure to pay it upfront at the desk of the parking place (even if you stay for only 1 or 2 days, the 3 day ticket is still cheaper).