It is a very convenient crossing. Ferries run frequently even at night. It costs 5 euros. Saves a lot of time. And you can watch the beautiful scenery from the ferry.
In off-season, the price for a passenger car is 4 euros one way, in season the price is 5 euros. There are no toilets on the ferries or on the pier. You cannot buy a round-trip ticket. One way only. They accept cards. When you arrive at the ferry, give a small piece of paper with a QR code.
P.S. Pedestrian passage on the ferry is always free.