The idea behind the rear suspension was to have the air ride to make it comfortable. Many people do not know that when you lift your car off the ground or tow the car you need to flip the switch or you WILL ruin the bags. Cadillacs ran a similar system except they did it with the shocks themselves. They are just as expensive to fix. If you don't take care of the system and the car itself, then yea you will have problems. So now it isn't the car that is the problem, it's the design of the suspension, and the responsibility of the driver of the car to take car of it.