Sixt are excellent I was upgraded for free. Nothing is too much trouble for them. I have used the competition and would recommend Sixt every time.
Krk Car Rental Deals
Sixt offers car rental options in Krk in Croatia. Here you'll find vehicles of any size for rent, a convenient service for any visitor whether on business or vacation in KrK. You'll find it to your advantage to rent a car from Sixt, the most reliable car rental agency in the country. No matter how large or small your party is, sixt can help you find the perfect car rental to meet your needs while in KrK. Here you'll find everything from the 8 passenger van to an economy rent a car option.