For example: [URL]http://www.hitairaustralia.com/frames.htm[/URL] As one who has (a few years ago) taken the pain of a shirtful of broken ribs in a relatively slow over-the-handle-bars off, I am wondering if this system (or one like it) could prevent the bone breakages. It all looks OK but what are the down-sides (weight? comfort? inconvenience? etc?) Personal experience? second hand anecdotes? theory? utter codswallop? All welcome. Thanks