I rented a vehicle from SIXT from 12/11/2022 to January 2, 2023. I was expecting a compact, economical car. A vehicle that is very good or great on gas/mileage. I was given an upgrade, at no extra charge, and it turned out to be a BMW 4 door sedan. Although it is a beautiful car, it turned out to be a major gas hog. It sucked up a lot of gas very QUICKLY. I was putting gas in the BMW twice per week. I wasn't driving super long distances either. The staff, I encountered, when I picked up the vehicle was professional, courteous and friendly. Very nice employees. PRICE point was fair. One must leave a $200 security deposit (which is not on their website) when picking up a rental car/vehicle at Sixt. The deposit is fully refundable 5 to 7 days after car return. I wasn't made aware of the security deposit until I arrived to pick up the vehicle at their offices on 12/11/2022. The car return experience was confusing. No employees INSIDE behind the counter. I didn't know WHO was an employee and who was NOT an employee. Three people were standing OUTSIDE chatting. As I approached the front doors no one said "May I help you?" There was NO ONE INSIDE at the counter. Finally, I asked a young lady, who was standing OUTSIDE if she is an employee. She answered Yes. Then, I informed her I was returning a rental car. I asked her if I needed to sign ANYTHING since I was returning a car. I also asked who or where do I return the keyless BMW (the key). No one was providing me with any information. I asked questions in order to obtain answers on returning the vehicle, what to do with the key etc. Customer service, for the car return, was disappointing. I ended up renting a 2nd vehicle, from Jan. 3, 2023 to January 24, 2023 from ANOTHER car rental company. I wanted an economical compact car that is GOOD on gas. Instead, I was given a BMW 4 DOOR sedan that was NOT economical on gas. The BMW turned out to be a major gas hog. If you don't mind filling up a vehicle, twice in 1 week, with expensive premium gas, go for it and drive in style. If you are on a budget and you don't want to put gas in a vehicle twice per week, and spend a fortune on gas, this is NOT the car for you.