Mario was accommodating with any requests or questions I had prior to and during our stay. Our flight was late getting in and he stayed at the management office - it's on the 1st floor - longer than anticipated to let us in.
The location is very central and great for a couple of first timers in Porto who are wanting to see the old parts of the city. The building is on is a steep, old cobblestone road so if you have heavy rolling suitcases as we did, try to park close. The unit is on the top floor and is a walk up. It's tight quarters but perfect for a couple. The balcony is quite nice and has some pretty views. The unit doesn't have AC so you'll likely want the window open at night and the provided fan going. If you're a light sleeper there can be some street noise, but we didn't find it too bad. Overall, it's a good little spot.