I rent a car with Sixt often, and generally it's ok. But here, manager tried to upsale the rent very aggressively.
I visited Bosnia and Montenegro and wanted to take a loss damage waiver with €700 deductible, and the manager convinced us to buy full damage protection because “it's Bosnia and Herzegovina and Montenegro, it's very dangerous” and “even if it's a small scratch, it will require to paint the whole element or body, and it costs more than €700”.
Ok, my friend told me that they rented a car this New Year and it had its windows broken in Sarajevo merely for having Serbian plates, so it sounded reasonable (although I could agree to a smaller deductible rather than full coverage as I never experienced anything bad in Bosnia and Herzegovina). But “we'll paint it whole for a minor scratch”? I rented from Sixt in the airport, and it had half of the body scratched, and it certainly didn't happen in one day. What are you talking about?
The other thing, he convinced us to get a “deal” of refuelling the tank by Sixt. It would be cheaper/same price as we would refuel on the gas station if we ordered it at the place rather than in the app. Aaaand it turned out to be false, because it would require the most premium gasoline to be filled into this small car, and we fill the tank with regular gas. The other thing, as we traveled from Bosnia, we filled the tank with much cheaper gas. So we lost around €20 on this “deal”.
The car itself was ok, but the back seat was dirty and we found it after the rent started. I guess they would make us pay for that as we didn't find it in time? But we had full damage coverage so we'll never know. And oh, I made a visible dent/scratch by hitting a wall while reversing, they didn't mention it. You'd say “that's because you had full coverage”, but I also had windshield protection and they made me sign a paper for the insurance company because it cracked, so no, they just didn't care.