Check-in is in their office, about 15mins walk, friendly guys.
The apartment was still being cleaned as we arrived (15h), but the cleaning lady was very friendly and apologetic. We just left our bags and went into town. Great location, just on the edge of the old city centre + close to the station.
The apartment is on a rather busy street, so there will be some noise as you open the window, but not too bad in our opinion.
The place is really clean and looks exactly like the pictures. You get what you pay for, we'll likely stay here again.