My 'Flip a nickel' test is faster. It works just as well as Genviro. I have more data on it than DECN does on Genviro. ( Unlike DECN I AM able to quote ACTUAL selectivity and Sensitivity percentages! (But just like DECN, I am not going to spoend any time here dwelling on what these numbers actually are!). And at only 0.05$ for unlimited testing, its way cheaper than Genviro too!