Rented recently in Nov 2022. They recommend a minor topic for an Audi Q2 running diesel which is good as there is a lot of driving. The customer service (Charlotte) was great (even ask us if you want a coffee before your trip). Instruction was clear. While there was a minor hiccup where the fuel tank was not full when it was issued to me, they did the reasonable rebate at the end of the trip. I had always good experience from Sixt car. Just to note that I always buy all the coverage (excess 0) and pre fuel tank so I do not have to stress over refueling when I return. The return was also smooth. Their vehicle has always been good and clean.