Hi BurntToast. Yes, I used only the powdered Urine kit for my test. I had smoked several times a week for awhile now but I could be considered a moderate smoker. I just smoked small hits, not much. The test was at a clinic of course and it was pretty easy. I was suprised at how little atention they paid. I easily brought the substitute into the bathroom in my pants. Of course I had already had it mixed and tried to keep it at the normal temp. Anyway, the results came back OK after 3 days. I have also used a drink to pass a government job test a couple of years back. Got the drink from the same company. It worked great and I smoked a lot more then.