Agreed, I still want to find out how this product works in places like Warren Ohio, Joplin, Missouri, Greensburg Kanasas (Most Damaging Tornadoes I can think of off the top of my head) Where tornadoes while not "common" also aren't "rare" and as such roofs need to be able to sustain pre-tornado weather (including hail) at least a few times a year. (to be reliable)
It doesn't matter how it performs in a Joplin or Moore-class tornado, when the house it was attached to has been blown into the next county. The only exception would be that a glass shingle going 200mph is more dangerous than a shred of composition going the same speed.
Traditional composition shingles are flexible. I live in north Texas where we get plenty of nasty weather. You can see comp shingles lifting a bit in high wind (think petting a cat or dog the wrong way). Once that happens, it gives the wind something to grab, and can start a feedback loop. A rigid material wouldn't have that problem.
Likewise, we had a bad hail storm last May. My roof had to be replaced, but the glass in all of the cars on the street was fine. Insurance companies around here give pretty good discounts for hail resistant roofing, so you might actually save money there, too, especially if it really ends up being cheaper to install (in my case, going from the normal shingles that were on the house when I bought it to class 4 impact ones saves about $1k every three years on insurance for a fairly small roof, so it's not insignificant).