I am waiting on my urine test (used quck fix 5.7) to come back from SOnora Quest labs. Got it done Sat. late afternoon and it is Monday morning, so I am not sweating too much since it has not been long enough. After reading some of the discussions, I wanted to share with some of you my experiences with Labcorp and Concntra as well as SOnora Quest. I use a whizzinator and the powdrered stuff you have to mix that is sold with it and used it twice at Concentra....once for preemployment and another time for a random. They put it through the e-cup thing and it screened it and then it was sent out to somewhere in Kansas. I got a negative result in 2 days. The second time I used the powedered stuff that you mix yourself that is ordered from same site at Whizzinator but I used regular tap water and not distilled water as the instructions suggested this time around....it went through the e screen cup machine again, was sent out to Kanasas but this time it took like 9 days for the results to come back negative. Dont know if it was the tap water or distilled water that made the diffrence in time, but the dehydrated powdrered urine that is sold w the wwhizzinator set passed the e cup screen thing twice without a problem....also after you pee at concentra, they put you in a gown for your physical and do check your balls for coughing. When they ask you to change into the gown, take off your whizzinator or anything else that can incriminate you and tuck it inside your shoe and place your clothes neatly folded on top of your shoes under the chair. They did not check my shoes or clothes or anything, they just did a regular physical, but had I worn my device after I took that test, I would have been caught for sure. Just giving everyone a heads up. I am a job jumper and also passed urine tests at Labcorp and sonora quest in the last two years using qucik fix 5.7 without any problems. I have never used quick fix for COncentra e-cup test so cant tell you if it will pass, but the powdered stuff worked without a problem.