Dominique's is very centrally located. I took a train CDG airport and it was about 15 min walk to his place. I left Paris for London on Eurostar and again it was easy for me to walk to station.
Dominique was kind enough to let me check in early. On the last day, we left our luggage at Dominique apartment and so we could explore Paris for one morning. Dominique stays two floors above the apartment and so it is easy to contact him and make arrangements with him. Dominique even help to wash the laundry for us. His place is highly recommended.