They guys on Husky Cafe did a group buy and seem to like the tool. I honestly don't see the advantage over a set of irons. You still need something to break the bead and remove the tire and putting the tire on isn't ever really that big of a deal, but I can appreciate the desire for a new gadget.
"Fools you are. To say you learn by your experience. I prefer to profit by others' mistakes and avoid the price of my own."
- Otto von Bismarck