I rented a car through them. RED FLAG! Avoid at all costs. Never would I do this again! They're selling you insurances (through AXA) that are not accepted on arrival at the airport and their policies aren't matching the car rental company's policies.
And the best part is: You won't get a refund for anything. There's no way for you to claim anything back.
DO NOT. BOOK. A. CAR. WITH. OPODO.