What's the rough price on that stuff? All I could find on the site was instructions to measure all the windows you wanted treated and then email them and wait for them to call.
The product i used wasn't "shatterguard" but the same stuff from a different company. I have two brothers that are in the glass/tint/windshield business. My older brother had some samples (2 rolls) at the shop he worked. the two rolls was enough for all my first floor windows, and the back windows at my parents house.
IIRC, I think the cost was about $40 per window if you had to buy it