Location is excellent, very close to Gard du Nord and Gard Magenta train stations. Gard du Nord is station connected to CDG airport. Alex is a great communicator and was flexible accommodating our luggage pre and post check-in. The apartment was spacious and clean. We used the single ticket method for transit and now I would recommend a Paris transit card. We used the Paris Museum Pass for most all of our trip. Timed entry to the Tower at Notre Dame requires using an app, Duck The Line, at 7:30am the morning of your visit.