Do not rent from Green Motion
I went to Iceland with my family for a quick 5 day vacation for Labor Day weekend this summer. After getting picked up at the airport and being ferried 30 minutes away to the Green Motion Car Hire garage and waiting another 30 minutes to get called to pick up my car, I chose not to get the absurd ~$2300 "premium insurance" because I've always been a careful driver, and my credit card covers it.
However, after getting my keys, I was shown my car which was outside in the pouring rain, and no Green Motion employee came to inspect the car with me! And even though I took pictures, it was quite difficult to do any type of proper inspection in the pouring rain...this will be important later. In addition, as soon as I pulled out to pick up the rest of my family which I had left at the airport, I found that they had given me a car with virtually no gas, with only enough room for 20K mileage. Unfortunately, when I went to three various gas stations to refill, but none of them would take any of my chip and non chip credit cards, and there was no one to help me, so I had to waste another hour of fruitless efforts and driving back to Green Motion to demand they fill up the gas tank for me.
Thankfully my vacation itself was quite lovely - Iceland is beautiful! However, upon returning my car to Green Motion, even though I took quite a comprehensive set of photos of the car's initial damages, Green Motion charged me for a tiny damage to the paint that wasn't even 1/3 the size of a standard American penny. Unfortunately my photos that I took of the front end of the cover didn't cover that one section, and so I couldn't prove that it wasn't me. They then tried to charge me for another similar nick, but thankfully I did have a photo for that damage, and they had no choice but to let it go.
They then charged me the full ~$2300 insurance policy until they could get the damage assessed by a local garage. Recently the full bill has come out to be $1300 for the small nick, which is absolutely ABSURD, especially seeing as how I've talked to multiple car garages who said they would all quote damages at ~$200-$300. I will now be contesting this claim with my credit card insurance providers to get my due justice, but BUYER BEWARE - Green Motion will do everything they can to squeeze every single bit of money out of you that I can.
Sadly it wasn't until after I had this experience that I did my research and realized this is a common problem with Green Motion all around the world, but particularly their outpost in Iceland. Check Trip Advisor if you don't believe me...