I use Winner. They use your car to take you to the airport. Since I sometimes travel alone, I do not need to drag my luggage onto the shuttle. You are dropped off right outside the departure terminal. When coming back, they bring your back to the airport and then you go back to Winner, or you can choose to pay a little extra to leave directly from the airport.
I have always been able to find discounts coupons to make this place the cheapest among all others.