Amazing Insulation, Or Magic Beans?

I've heard enough positive about Super Therm insulation to be interested, but it still sounds a bit too good to be true. This ceramic paint claims R-19 equivalent insulation with one layer because of floating balls of ceramics, nanotechnology and all that hot stuff. Here's a report from one of the distributors about performance of this paint on shipping containers, and here's Bob Vila talking to some guy in Florida about converting shipping containers to Super-Therm-coated houses. The company doesn't seem willing to just give me the ~10-gallon sample I'd need to coat the container, and the paint costs about $65 per gallon. Is it worth buying on the hope that it's all the insulation I need, or would I be spending half the initial cost of the container on the equivalent of magic beans?