Many years ago I took that ferry to France - the journey lasts 4 hours.
It was an enjoyable experience when crossing in spring or summer and when you have plenty of time.
The company was French, initially, but has been merged with a Danish company called DFDS.
In summer 2021 I took the opportunity to fly around and create a video focusing on the arrival/departure of the Roll on/Roll off service.
I managed to film around the small town while departure preparation were taking place.