Do not rent electric cars. Each charge costs $50, but it actually only requires $25–28. If you drive long distances in a day, you'll end up paying double the electricity fee, which is quite unreasonable.

When returning the car near LA airport, there was a large open-air parking lot shared by three rental companies. The staff on duty that evening gave quick and rushed instructions, asking us to simply leave the keys and go. Later, I discovered that Hertz had overcharged me for an extra day's rental. Fortunately, I had taken some photos as proof, and Rentcars was very proactive in helping me reclaim my dues. However, I was not happy with Hertz's overall process. Make sure to carefully monitor any extra charges on your credit card when renting and returning cars.

希望した車種の在庫がなく日産のRougueになってしまった

Beware of upgrade traps. They mentioned a free upgrade, but it ended up costing money, and it wasn't cheap.

Rented a Toyota but got a Hyundai.