We did a demo last week, and used a driver's side bag from a 86 300E.
As John Candy used to say in the SCTV Farm Film Report: "Blowed up real good!".
http://www.youtube.com/watch?v=BWc54-5oJbk
Biggest problem I've seen is that the seams start to split on the old ones. I've sold good ones (no seam split) on eBay, and they bring little money, so any split ones I run across, I save for the fun of exploding them. Sounds like a 12 gage shotgun going off. Quite hot afterward, as well.
So far, we've exploded three, and will be doing another this afternoon at the MBCA driveway mechanic section event.
Jim