The check-in process for this room is seamless. The hosts will provide a code to get into the building and the key is kept in a little lockbox that they will also give you the code for. The room itself is nice and clean, small but comfortable, and the location can't be beat. The apartment is tucked into the back of the building away from the street and is completely quiet. Absolutely recommend staying here, great price, perfect location next to the Chatelet-Les Halles metro station.