I remember watching that. That is one heartfelt man that cares about farmers. Not enough profit margin for Mr. Wonderful.
On the practical level that is saving lots of water. 2500 gallons per tree down to 800 gallons. Saving 1700 gallons per tree. The economic cost of that water varies from place to place. But it clearly pays for itself. The biological savings is great, but not important enough for all investors.
I wonder what the environmental cost of the material used in its manufacturing. Off gassing plastic, reusing, recycling ECT. It's seems those cost might be outweighed by the water savings. Do any Permies use these?