I also rented only with Island although it is somewhere (close) off-site now. One of the first times, the car had a hole in the floor on the driver's side - gave me a nice view of the migrating crabs I missed/crushed.

Take a 360 video of the car, including the spare tire, and focus on any body damage. I've had the receivers try to claim I dinged up a rim on the spare! I've found the first day takes a bit getting use to driving on the other side - wake up the next morning and it's all good!