I have at least a million miles in air ride seats, in trucks that bounce like jack hammers,
and I'm not impressed. They tend to bounce up and down too much. That's bad
enough, but when you drive over a big whoop in the road, they bottom out, and
that REALLY hurts. I once installed a stiffer damper ("shock absorber") from a
car suspension on one and that helped a lot. I've also been known to let all the
air out, with a block of wood underneath for height adjustment. My bus sure
doesn't need an air ride seat, and neither did the conventional I had before.
For me, it's all about finding a seat that fits my butt and back.
If you do buy a used air ride seat, you'll want to replace the damper for
sure -- they wear out and the bouncing gets worse.
Your milage may vary, of course.