They do have their uses, got this guy back in the surf, but I wouldn't like to see able bodied people out there with one just because they are to unfit or lazey to paddle, bit like people that can't swim relying on their legrope, heaps less people back in the day when we didnt have legropes.
www.seabreeze.com.au/forums/Windsurfing/Tasmania/Camerons-Story-on-ABCs-730-Report-tonight/