Rented a mini cooper S cabrio last week at Geneva airport. Service at the arrival was verry helpfull and friendly. Can't remember his name. But man if u read this review, u asked me to put youre name in here, sorry I can't remember :).
The car was clean and smelled like new. I don't understand why people give so many bad reviews.
The best thing you can do is take all inclusive insurance. No discussions about scratches or something else. Ok it's a quit bit money but you have no worry's. They gived me a clean car i gived the car clean back.
Next time i will rent again with Sixt.