Very poor! Not recommended to rent from AVIS! Renting without problems is fine, but once an issue arises, the communication cost is too high to resolve it. I returned a car to AVIS in Istanbul in May with tire damage, and until mid-July, I still haven't received a refund. This time in Sarajevo, AVIS charged arbitrary fees for cross-border use and additional drivers. When I asked different staff at the counter, I got different answers! When booking, the website stated a 100 EUR cross-border fee, but at pickup, I was charged 145 EUR, and at drop-off, the counter said it should be 170 EUR. Talk about random charges! And the additional driver fee, the website says 12 EUR, but the counter charged 15 EUR! At pickup, they charged 15 EUR per day for 13 days, but at drop-off, they said it should be capped at 7 days! AVIS Sarajevo charges randomly and without consistency! No wonder their rating is so low! Think twice if you're planning to rent from them!