My advice would be to arrive as soon as check in opens (at 3pm) and inspect the whole flat. If you have any issues raise it then and then with the host. If you will be arriving late or in the evening I suggest you book somewhere else for the night and go to his place the following day during the day. The host seems like a nice enough person who responds quickly and gave as an option to check out late. We had issues with the cleanliness of the place, mattress (which is subject to opinion) and with insects coming in to the apartment. That might not bother others but it bothered us as we were travelling with very young children and we did not feel it was to standard for us. There are other places in the area for the same price range that offer more.