Pros:
The property and room is modern and tidy. The elevator is a big plus. Air conditioning cools the room quickly. Housekeeping is good, though the drinking water didn't get refilled some days. The views of the Douro River are great. Mattress is ok, though a little hard.
Cons:
While the walls are soundproof, the ceiling certainly isn't. The house is very old and the floors creak with every step you take and when the upstairs neighbours walked around their room, we heard every step they took. And they walked around in the evening and late into the night till 2am-3am! You could hear when they got on the bed as well... It didn't help when they would get up early in the morning before 8am either. One of the days they got up around 6am for maybe going home? Unfortunately receptionist wasn't able to help, as even after speaking to the people the situation remained the same. Something needs to be done about these floors. When you travel, a good night's sleep is what you look forward to at the end of a long day out and about!
As the hotel is close to the main road, you can hear the cars and trams from early morning driving past as the windows let quite a bit noise through. If you are a light sleeper, that would wake you up.
While the busses have good connections to the central Porto and the beach, the buses are very unreliable and getting to hotel would take 30min. rather than 10min.
The shower head was broken, so showering was a bit of a circus.
Not enough space to store clothes.