I don't know about all the great reviews but my unit (received Dec.22/09) works only on about 10% of the tests. After having two shots of vodka or two shots of tequila it shows 0.000. After a pint of strong European beer another 0.000. I follow all the manufacturer instructions and still poor results. Only a couple of times the unit indicated some reading. Now I am waiting for a replacement.Get more detail about BACtrack Select S80 Breathalyzer Professional Edition.
