I'm ordering a few of these... People use the getterback, but for around the same price I don't see how this wouldn't be a far superior product. I am NOT affiliated with this company. I've also heard some of the getterbacks dont ever pop, not trying to bash the product, just informing everyone of one I find superior. (as long as it works like they say). I see no problems with the balloon part, as long as the props are not still spinning. Yeah your bird will probably be in rough conditions, but its better then it sitting on the sandy bottom or pulling it up when its snagged on a log or a pile of rocks. If you go to the site you can watch a video of how it works. Even visible at night.
Waterbuoy - Miniature Floatation Device

Waterbuoy - Miniature Floatation Device