Product review (5 stars): A Miracle Worker!
I picked this up at my local hardware store after reading these reviews, and this thing really does solve the problem. I looked up "stuck disposal" online and tried all the suggestions, including jamming a  broom handle down the drain! Nothing worked, so I sucked it up and got this for $8 at the store. Literally, I took it out of the package, found the right angle for the wrench, and it unstuck-just like that! The disposal works like new. All it needed was this thing to loosen the blade! Love this tool!