That was the worst experience I had with a car ren...

That was the worst experience I had with a car rental. The only positive thing that I can say is about the process of choosing car, fast and easy.
I booked my car in a package with spirit. When I arrived in LAX, I had to wait for half an hour for Dollar shuttles to take me to the store. All other companies picked up their costumers every minute, really every one minute one shuttle of other companies passed when some other costumers and I had to stay in cold weather for half an hour. The number of people increased so the waiting time at the store rose because of the congestion.
I had booked a small economy car because I was travelling alone. I tried to save my money for gas, also I crowded cities with huge traffic, the smaller car the better you can move and find a parking space. At the reception desk, they tried to sell another car (a larger one), gas saving option (if I paid $35 for two days rent, I did not have to return car with a full tank - not a good option for me), and the insurance. When I refused the recommendations, the receptionist became cold and changed his manner. He was not welcoming anymore. It was not a good experience for me.
They put $400 on hold on my credit card, and charged me $19 for tax and service ($9 state tax and $10 for services) which does not make sense when you prepay for car in a package. The other thing is about gas receipt. If you do not buy the gas option, you are required to show the receipt of gas that shows you refilled the tank within 10 miles from their store, otherwise they charge you a full tank, $25 at least, so odd.