This little van is a great chance to explore the island on your own and see all the little hidden places around Oahu. The hosts are extremely helpful and will attend to your messages nearly instantly.
Pick up instructions will be send to you on the day of the reservation and are very clear. Note that you have to travel inland with an Uber or bus (you'll need $3 cash per person per bus - busses give no change!) If you take the bus you have to walk ~10 minutes as well so make sure you can access Google maps.
If you're looking for a quick car, this is not the right one for you - it'll take you around but you have to take it slow. But you're not on Hawaii for a race so relax and enjoy the views.
The interior is very lovely and thoughtful set up with all little necessaries you might need. You will be able to charge your phones via USB cable and the car has a full setup of fairy lights that'll brighten up your nights. The air conditioning works perfectly and is a life saver. There is a cooler box which works wonders to cool down your drinks - just buy a little bag of ice (a bag with 7lb ice cubs lasts you a full day and night). You can cook some easy dishes on the gas cooker with the pan that's available in the cupboard. The car was very clean with soft, comfortable bed sheets. It comes with 2 beach chairs which is very nice and there's a bamboo mat which you can spread out in front of the car to use to get sand off your feet (you won't believe how important this is).
Important: If you want to camp on a camp ground here you have to pre book 2 weeks in advance if you want to play it safe! Officially you are not allowed to just sleep in your car but I'll guarantee you that you'll find some good secluded spots around the island where you can rest! Just keep your eyes open while exploring.
Little advice: Hawaii is extremely expensive. The van burns fuel very quickly but you won't need much as the island is not very big ($50 fills up the tank halfway).