This is the company that has the exclusive rights to Alphakat in the US. Alphakat disassociated themselves with the company of ill repute before aligning themselves with GEYI.
Covanta studied over 200 systems before choosing GEYI- Alphakat and have been testing it in the USA since June 2010 (and they stated up front it would take 6 months to a year to complete the testing).
The Alphakat KDV 500 does not have a stack so no stack test.
Everything I state is just my own opinion so do your own DD.
Buying great stocks is important but buying great stocks at a great price is even more important.