Such a lovely stay at Serenata Rooms. Super easy check in process, Juliana upgraded us to their best suite (Sculpture Suite) in the house and even left some wine & chocolate for us. She was available on messages throughout our stay and was very accommodating if we needed anything. The room itself is very neat, the bed is comfortable and the bathroom is huge and super clean.
The location is a bit far from the city centre but we were happy to walk downhill for 20-25 mins and then take cabs on the way back. The house is on the main road and you can hear the cars passing by but it didn't bother us at all.
Juliana was very kind to let us check out late since we had an evening flight. We felt very safe & comfortable and would recommend this place if you're looking for a budget friendly stay in Porto.