Great value if you plan to explore different parts of the island. The van had a inflatable bed, cooler, table, chairs... Pretty much all you need to get around independently. The van we got was not the one in the pictures and was a bit older older looking. Expect minor glitches since these are old cars.
Make sure you get reservations for camper sites beforehand, since some of them do not allow same day reservations. Also, this is a long car. Unless you have experience with long cars and plan to stay at black sand beach overnight, think about another car for road to Hana. I saw people struggling with big cars on the way there.