This is a great apartment - its location is very central, yet it is quiet and comfy. It is managed by Porto City Hosts that seem to manage many apartments. They were easy to deal with and answered after-hour queries promptly - and happily stored our luggage both on day of arrival and day of departure. There was a problem with the lock to the main building - despite having two sets of keys neither my wife or I could gain entry. We then encountered other travelers who had had the same problem. When we reported the problem to Porto City Hosts they helpfully gave us a numeric password that gave us entry into the building without a key. So to avoid being stranded outside the building make sure you ask them for the numeric password.