I was really curious about bearing capacity of this material, and I found this spec sheet: https://my.civil.utah.edu/~bartlett/Geofoam/EPS%20Geofoam%20... The compressive strength is actually pretty good if you use the high-end stuff. I would be skeptical of the cost-benefit versus other common fills.

I almost spit out my coffee when I saw the section on levees and the anchors "(if necessary)" annotation. I would be very reluctant to market an extremely low-density product as a barrier for flood protection applications. It really makes me wonder about the rest of the statements in the brochure.