We had a really nice stay in Porto. The check in was easy, the rooms are nice. The location was just perfect if you want to do a little bit of sightseeing in Porto, but the rooms are silent enough to get a good sleep.
Mario is really helpful with everything. He texts you on WhatsApp so you can always ask him for Tipps and if there are any problems, he responds really quick. Overall a great experience and a perfect place if you want to stay for a few days and just need a room to sleep :)