There were hidden charges, and the staff was generally unfriendly. I clearly stated in English that we already had full coverage and didn't need additional insurance. The staff member verbally acknowledged this, but the contract still included the car rental company's full insurance by default. I specifically clarified verbally, but faced with a contract full of incomprehensible terms, a long queue behind me, and an impatient staff urging me, I had no signal and couldn't even use my phone to translate the contract. Should I hold up the line to translate every word of the contract or just trust the verbal assurance and sign? The company takes advantage of such situations to add hidden insurance without any hesitation, and since I signed the contract, there's no way for me to contest it! The pickup and drop-off process were fairly smooth though. Besides the snow mountains, there is nothing interesting in Serbia. Don't go, it's a poor place.