We had a great time at Joaquim s apartment. it was perfect for 2 couples. Big bedrooms, nice livingroom and a kitchen fully equipped.
The place is very clean and right in the middle of Porto. You have everything that you must see in Porto in 1km radius. 10 minutes far for luis I bridge.
The only lets say down thing it s just that in the weekend it tends to be a little noisy, but it is not a deal breaker.