We thought we had a ticket when we bought it from viator, so we stood in the Line with tickets. The line was long and in the entrance they told us that we did not had a ticket after standing in line for an hour and we need to convert the voucher into tickets and stand in the next line without tickets. We got tickets after standing in line one more time. The entire waiting period for tickets was almost one and half hours and we got into the last cruise departing at 10-30 PM . The website voucher should be clear enough to say that we need to convert voucher into tickets. The entire experience of the cruise once when we get in was amaziing.
Very pretty and really smooth. I often get sea sick and I did not. The trip circles around up to the nortre dame and then makes its way back. We took the 10pm cruise and it was perfect. The line still is a little long even with the ticket so just be prepared for that. The top is the best view.
The cruise was great and lasted for one hour. It is a great way to understand where is what before you explore the beautiful city on foot.
However, I believe there should be specific time slots for boarding the cruise which shall help tourists not standing in the queues if they have bought the ticket online in advance.