I have been travelling to Switzerland and every time I would purchase insurance at the rental desk. On this occasion, the insurance at the desk was almost double the price for the rental therefore I have browsed online and found Rentalcover.com, thank God I did, I ended up scrathing the side of the car and having one dent on the other side, while coming out of tight parking space, the total charges for repair were CHF 5000+, with the rental excess at CHF 3000 I had CHF 3000+ deducted from my account. RentalCover.com had sorted me out within 7 days, giving me back all the amount deducted by the car company. Their communication is excellent, I do recommend you keep the following documents in case you would need to claim insurance: SIGNED RENTAL CONTRACT, COMMUNICATION WITH RENTAL CAR COMPANY, SELF DECLARATION OF ACCIDENT or POLICE REPORT, BANK STATEMENTS CLEARLY SHOWING CHARGES ON CREDIT CARD. So, in short, I recommend rentalcover.com, but be reminded that purchasing 3rd party insurance will incur in charges on your credit card which can be inconvenient. This company has not let me down, I cannot recommend them enough.