Air Ride/Air Suspension. What's the Deal

Hey Guys. Most of us out there slam our car to the ground by use of coilover and/or springs. I love having a lowered car. It causes your car to become more aerodynamic. In other words faster. But unfortunately I have a steep driveway.

In other words, How's the ride on it? I heard it was rough, as in bouncy. Is air bags better than cylinders. I live in both rain and snow area. Let me know from those of you with experience on this type of suspension. Thanx