Recently took a pre-employment drug test for a hospital using clear choice quick luck ...I must say I was a bit nervous to use it because no one I know had ever heard of it...Anyways, long story short, I passed with flying colors! It worked. It’s a little bit on the pricey side but I swear it’s worth every penny... I didn’t use the heat activator that came in the box with it to be on the safe side ...I just used one of the two heating pads it came with. Just make sure you keep it within the 90-100 temp range and you’ll be fine. The test I took was a pre-employment 10 panel drug test. ( NON DOT SAP 10-50/2000 w/ NIT) —-Quest Diagnostics Lab in California